{
  "_type": "export",
  "__export_format": 4,
  "__export_date": "2026-07-20T17:11:02.021Z",
  "__export_source": "x402-marketplace:catalog",
  "resources": [
    {
      "_id": "wrk_x402_marketplace",
      "_type": "workspace",
      "parentId": null,
      "name": "x402 Marketplace",
      "description": "Every x402 Marketplace scenario as a runnable request, grouped by category. Generated from the live catalog at https://grug402.dev. Pay with radius-cli (documented per request) to receive the 200. Built by people at Radius (https://radiustech.xyz) — Built for Radius workshop. Stablecoin-native settlement infrastructure for the agentic internet.",
      "scope": "collection"
    },
    {
      "_id": "fld_happy-path",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "Happy Path",
      "metaSortKey": 0
    },
    {
      "_id": "req_compliant-get",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Canonical GET (real verify and settle)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/compliant-get",
      "description": "**Expected behavior:** The textbook x402 flow: an unpaid GET gets a 402 with a PAYMENT-REQUIRED challenge, then the server runs a real /verify and /settle against the Radius testnet facilitator.\n\n**What to watch:** Returns 200 with a PAYMENT-RESPONSE header carrying a real testnet txHash.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/compliant-get\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 1
    },
    {
      "_id": "req_compliant-post",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Canonical POST with body",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/compliant-post",
      "description": "**Expected behavior:** The same compliant flow as the canonical GET, for a POST that carries a JSON body.\n\n**What to watch:** The body is echoed back, and the payment really settles.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/compliant-post -H 'Content-Type: application/json' -d '{\"query\":\"radius\"}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"query\": \"radius\"\n}"
      },
      "metaSortKey": 2
    },
    {
      "_id": "req_compliant-body-get",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Body-primary GET challenge",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/compliant-body-get",
      "description": "**Expected behavior:** Returns a valid x402 challenge in the response body only (no PAYMENT-REQUIRED header). Clients that read the challenge from the JSON body rather than decoding the base64 header must handle this path.\n\n**What to watch:** Returns 402 with the full PaymentRequired object as JSON body. No PAYMENT-REQUIRED header is set. Pay with radius-cli to confirm the body-reading path works end-to-end.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/compliant-body-get\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 3
    },
    {
      "_id": "req_compliant-body-post",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Body-primary POST challenge",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/compliant-body-post",
      "description": "**Expected behavior:** The body-primary happy path for a POST endpoint. Challenge is delivered in the JSON response body only, no PAYMENT-REQUIRED header.\n\n**What to watch:** Returns 402 with the full PaymentRequired object as JSON body. No PAYMENT-REQUIRED header is set.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/compliant-body-post -H 'Content-Type: application/json' -d '{\"query\":\"radius\"}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"query\": \"radius\"\n}"
      },
      "metaSortKey": 4
    },
    {
      "_id": "req_cheapest",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Minimal price (1 atomic unit)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/cheapest",
      "description": "**Expected behavior:** A compliant endpoint priced at the smallest atomic unit, 0.000001 SBC.\n\n**What to watch:** Settles a micro-payment without rounding the amount down to zero.\n\n**Status:** Compliant\n**Price:** 0.000001 SBC (1 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/cheapest\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 5
    },
    {
      "_id": "req_multi-accepts",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Single testnet accepts entry",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/multi-accepts",
      "description": "**Expected behavior:** Advertises one testnet requirement that a correct client selects by matching its network.\n\n**What to watch:** The client picks the eip155:72344 entry rather than blindly taking accepts[0].\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/multi-accepts\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 6
    },
    {
      "_id": "req_idempotent-retry",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Correct idempotency (cached retry)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/idempotent-retry",
      "description": "**Expected behavior:** Caches the result by payment id, so retrying the same payment returns the cached 200 without charging twice.\n\n**What to watch:** A second call with the same payment returns Idempotent-Replay: true and does not re-settle.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/idempotent-retry\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 7
    },
    {
      "_id": "req_weather-now",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Weather API (pay-per-call)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/weather-now",
      "description": "**Expected behavior:** A themed but fully compliant data endpoint, gated by a real settlement.\n\n**What to watch:** Behaves like a genuine paid API: real verify and settle, then 200.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/weather-now\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 8
    },
    {
      "_id": "req_fx-rate",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "FX rate API (pay-per-call)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/fx-rate",
      "description": "**Expected behavior:** A themed compliant endpoint that returns an exchange rate after settlement.\n\n**What to watch:** Real verify and settle before the rate is returned.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/fx-rate\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 9
    },
    {
      "_id": "req_haiku-generator",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Haiku generator (POST, paid)",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/haiku-generator",
      "description": "**Expected behavior:** A compliant POST endpoint that returns generated content after settlement.\n\n**What to watch:** The body is accepted and the payment settles before content is returned.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/haiku-generator -H 'Content-Type: application/json' -d '{\"topic\":\"x402\"}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"topic\": \"x402\"\n}"
      },
      "metaSortKey": 10
    },
    {
      "_id": "req_joke-api",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Joke API (pay-per-call)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/joke-api",
      "description": "**Expected behavior:** A compliant GET that returns a joke after a real settlement.\n\n**What to watch:** Real verify and settle, then 200 with a PAYMENT-RESPONSE.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/joke-api\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 11
    },
    {
      "_id": "req_dictionary-api",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Dictionary API (pay-per-call)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/dictionary-api",
      "description": "**Expected behavior:** A compliant GET that returns a definition after settlement.\n\n**What to watch:** Behaves like a genuine paid lookup.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/dictionary-api\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 12
    },
    {
      "_id": "req_quote-api",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "Quote API (pay-per-call)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/quote-api",
      "description": "**Expected behavior:** A compliant GET that returns a quote after settlement.\n\n**What to watch:** Real verify and settle before the quote is returned.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/quote-api\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 13
    },
    {
      "_id": "req_mpp-push-happy",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "MPP push happy path (EIP-3009)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/mpp/mpp-push-happy",
      "description": "**Expected behavior:** Compliant MPP push flow: server issues WWW-Authenticate: Payment challenge, client submits EIP-3009 authorization credential, server validates structure and returns 200 with Payment-Receipt.\n\n**What to watch:** Returns 200 with Payment-Receipt header. Submit Authorization: Payment credential=\"<base64-push-payload>\" to pass.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/mpp/mpp-push-happy\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 14
    },
    {
      "_id": "req_mpp-permit-happy",
      "_type": "request",
      "parentId": "fld_happy-path",
      "name": "MPP permit happy path (EIP-2612)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/mpp/mpp-permit-happy",
      "description": "**Expected behavior:** Compliant MPP permit flow: challenge requests an EIP-2612 permit credential. Client submits signed permit in Authorization: Payment, server validates and returns 200.\n\n**What to watch:** Returns 200 with Payment-Receipt. Credential must have type:\"permit\" with owner/spender/value/deadline/nonce/v/r/s fields.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/mpp/mpp-permit-happy\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 15
    },
    {
      "_id": "fld_challenge-construction",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "402 / Challenge Construction",
      "metaSortKey": 16
    },
    {
      "_id": "req_status-401",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Returns 401 instead of 402",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/status-401",
      "description": "**Expected behavior:** Gates the resource with 401 Unauthorized instead of 402 Payment Required.\n\n**What to watch:** Clients that key on a 402 never start the payment flow.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/status-401\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 17
    },
    {
      "_id": "req_status-403",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Returns 403 instead of 402",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/status-403",
      "description": "**Expected behavior:** Gates the resource with 403 Forbidden instead of 402.\n\n**What to watch:** Looks like a hard authorization failure, so the client never sees a payment challenge.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/status-403\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 18
    },
    {
      "_id": "req_status-400",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Returns 400 instead of 402",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/status-400",
      "description": "**Expected behavior:** Gates the resource with 400 Bad Request instead of 402.\n\n**What to watch:** A valid call looks malformed, so the client never starts paying.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/status-400\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 19
    },
    {
      "_id": "req_status-200-leak",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Returns 200 with content (no gate)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/status-200-leak",
      "description": "**Expected behavior:** Serves the protected content for free with a 200 and no payment gate.\n\n**What to watch:** A total bypass — paid content is leaked to non-payers.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/status-200-leak\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 20
    },
    {
      "_id": "req_missing-payment-required",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "402 without PAYMENT-REQUIRED header",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/missing-payment-required",
      "description": "**Expected behavior:** Returns a 402 but omits the PAYMENT-REQUIRED header entirely.\n\n**What to watch:** The client is told to pay but has no requirements to sign against.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/missing-payment-required\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 21
    },
    {
      "_id": "req_header-raw-json",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "PAYMENT-REQUIRED is raw JSON (not base64)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/header-raw-json",
      "description": "**Expected behavior:** Sends the PAYMENT-REQUIRED requirements as raw JSON instead of base64.\n\n**What to watch:** Strict base64 decoders fail to parse the header.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/header-raw-json\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 22
    },
    {
      "_id": "req_header-bad-base64",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "PAYMENT-REQUIRED is invalid base64",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/header-bad-base64",
      "description": "**Expected behavior:** The PAYMENT-REQUIRED header value is not valid base64.\n\n**What to watch:** The client throws at the decode step, before it can read the requirements.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/header-bad-base64\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 23
    },
    {
      "_id": "req_header-base64-not-json",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Base64 decodes to non-JSON",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/header-base64-not-json",
      "description": "**Expected behavior:** The PAYMENT-REQUIRED header is valid base64 but decodes to bytes that are not JSON.\n\n**What to watch:** JSON parsing fails after a successful base64 decode.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/header-base64-not-json\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 24
    },
    {
      "_id": "req_amount-as-number",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Atomic amount as a JSON number",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/amount-as-number",
      "description": "**Expected behavior:** Emits the atomic amount as a JSON number instead of a string.\n\n**What to watch:** A number-typed amount can silently lose precision; the spec requires a string.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/amount-as-number\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 25
    },
    {
      "_id": "req_missing-x402-version",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Missing x402Version",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/missing-x402-version",
      "description": "**Expected behavior:** The PAYMENT-REQUIRED body omits the x402Version field.\n\n**What to watch:** The client cannot confirm which protocol version it is negotiating.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/missing-x402-version\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 26
    },
    {
      "_id": "req_legacy-v1-headers",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Legacy v1 headers (X-PAYMENT)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/legacy-v1-headers",
      "description": "**Expected behavior:** Emits the legacy v1 X-PAYMENT header instead of the v2 PAYMENT-REQUIRED challenge.\n\n**What to watch:** v2-only clients ignore it and see no payment prompt.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/legacy-v1-headers\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 27
    },
    {
      "_id": "req_empty-accepts",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Empty accepts array",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/empty-accepts",
      "description": "**Expected behavior:** The PAYMENT-REQUIRED challenge advertises an empty accepts array.\n\n**What to watch:** The client has no payment option to select.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/empty-accepts\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 28
    },
    {
      "_id": "req_unsupported-scheme",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Unsupported payment scheme",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/unsupported-scheme",
      "description": "**Expected behavior:** Advertises a payment scheme the facilitator does not support.\n\n**What to watch:** The client cannot construct a matching payment payload.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/unsupported-scheme\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 29
    },
    {
      "_id": "req_wrong-network-mainnet",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Advertises mainnet, settles on testnet",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/wrong-network-mainnet",
      "description": "**Expected behavior:** Advertises a mainnet network id while the facilitator runs on testnet.\n\n**What to watch:** Testnet wallets find no matching network, so verify fails.\n\n**Status:** Quirk — responsible party if it misbehaves: Network / Chain\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/wrong-network-mainnet\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 30
    },
    {
      "_id": "req_wrong-token",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Wrong token contract address",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/wrong-token",
      "description": "**Expected behavior:** Advertises an asset contract address that is not SBC.\n\n**What to watch:** Verification fails on an asset mismatch.\n\n**Status:** Quirk — responsible party if it misbehaves: Token Issuer\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/wrong-token\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 31
    },
    {
      "_id": "req_wrong-decimals",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Wrong decimals (18 instead of 6)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/wrong-decimals",
      "description": "**Expected behavior:** Expresses the amount with 18 decimals for a token that has 6.\n\n**What to watch:** Overcharges by roughly a trillion times.\n\n**Status:** Quirk — responsible party if it misbehaves: Token Issuer\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/wrong-decimals\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 32
    },
    {
      "_id": "req_wrong-payto",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Wrong payTo address",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/wrong-payto",
      "description": "**Expected behavior:** Advertises a payTo address that is not the merchant's wallet.\n\n**What to watch:** A successful settlement would route funds to the wrong recipient.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/wrong-payto\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 33
    },
    {
      "_id": "req_missing-resource",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Missing resource URL",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/missing-resource",
      "description": "**Expected behavior:** The PAYMENT-REQUIRED challenge omits the resource object.\n\n**What to watch:** The payment cannot be bound to the specific request.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/missing-resource\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 34
    },
    {
      "_id": "req_expired-quote",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Already-expired quote (timeout 0)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/expired-quote",
      "description": "**Expected behavior:** Sets maxTimeoutSeconds to 0, so the quote is dead on arrival.\n\n**What to watch:** The signature expires before it can be used.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/expired-quote\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 35
    },
    {
      "_id": "req_overlong-validity",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Overlong validity window (1 year)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/overlong-validity",
      "description": "**Expected behavior:** Sets maxTimeoutSeconds to a full year, widening the replay window.\n\n**What to watch:** A signed quote stays usable for far too long.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/overlong-validity\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 36
    },
    {
      "_id": "req_changing-price",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Price changes every request",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/changing-price",
      "description": "**Expected behavior:** Increases the advertised amount on every request.\n\n**What to watch:** The quote a client signs may no longer match the server at settle time.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/changing-price\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 37
    },
    {
      "_id": "req_dollar-string-price",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Dollar-string price ($0.0001)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/dollar-string-price",
      "description": "**Expected behavior:** Advertises the amount as a human dollar string instead of atomic units.\n\n**What to watch:** Atomic-unit parsers reject the value.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/dollar-string-price\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 38
    },
    {
      "_id": "req_sensitive-metadata",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Sensitive data in metadata",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/sensitive-metadata",
      "description": "**Expected behavior:** Leaks fake PII into the resource description before any payment.\n\n**What to watch:** The facilitator and on-chain observers see sensitive intent.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/sensitive-metadata\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 39
    },
    {
      "_id": "req_wrong-transfer-method",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Wrong asset transfer method",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/wrong-transfer-method",
      "description": "**Expected behavior:** Sets extra.assetTransferMethod to something other than permit2, so the facilitator can't move funds.\n\n**What to watch:** Verification fails on a transfer-method mismatch.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/wrong-transfer-method\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 40
    },
    {
      "_id": "req_zero-price-gated",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "Advertises a zero price but still gates",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/zero-price-gated",
      "description": "**Expected behavior:** Advertises an amount of 0 yet still demands a payment header.\n\n**What to watch:** The client signs a zero-value permit that settles nothing.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0 SBC (0 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/zero-price-gated\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 41
    },
    {
      "_id": "req_mpp-wrong-status",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "MPP challenge returns 401 instead of 402",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/mpp/mpp-wrong-status",
      "description": "**Expected behavior:** Issues the MPP payment challenge with HTTP 401 Unauthorized instead of the required 402 Payment Required.\n\n**What to watch:** Clients that key on status 402 to start the MPP flow never see the payment prompt.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/mpp/mpp-wrong-status\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 42
    },
    {
      "_id": "req_mpp-missing-authenticate",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "MPP 402 without WWW-Authenticate",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/mpp/mpp-missing-authenticate",
      "description": "**Expected behavior:** Returns 402 but omits the WWW-Authenticate: Payment header entirely. The client receives a payment signal but no challenge to respond to.\n\n**What to watch:** Client stalls — no challenge means no credential can be constructed.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/mpp/mpp-missing-authenticate\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 43
    },
    {
      "_id": "req_mpp-raw-json-authenticate",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "WWW-Authenticate challenge is raw JSON (not Payment scheme)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/mpp/mpp-raw-json-authenticate",
      "description": "**Expected behavior:** Emits WWW-Authenticate with the challenge embedded as raw JSON instead of the \"Payment method=\\\"evm/charge\\\" challenge=\\\"<base64>\\\"\" format.\n\n**What to watch:** Strict MPP parsers reject the malformed auth-scheme and cannot extract the challenge.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/mpp/mpp-raw-json-authenticate\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 44
    },
    {
      "_id": "req_mpp-bearer-authenticate",
      "_type": "request",
      "parentId": "fld_challenge-construction",
      "name": "WWW-Authenticate uses Bearer instead of Payment scheme",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/mpp/mpp-bearer-authenticate",
      "description": "**Expected behavior:** Returns WWW-Authenticate: Bearer realm=\"...\" — the OAuth scheme — instead of the Payment scheme. MPP clients have no credential type to submit.\n\n**What to watch:** An OAuth client might initiate a token flow; an MPP client sees no payment challenge.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/mpp/mpp-bearer-authenticate\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 45
    },
    {
      "_id": "fld_verification-gaps",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "Verification Gaps",
      "metaSortKey": 46
    },
    {
      "_id": "req_skip-verify",
      "_type": "request",
      "parentId": "fld_verification-gaps",
      "name": "Skips /verify, settles directly",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/skip-verify",
      "description": "**Expected behavior:** Goes straight to /settle without a /verify pre-check.\n\n**What to watch:** Bad payloads are only caught at settle time.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/skip-verify\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 47
    },
    {
      "_id": "req_verify-only-no-settle",
      "_type": "request",
      "parentId": "fld_verification-gaps",
      "name": "Grants on /verify, never settles",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/verify-only-no-settle",
      "description": "**Expected behavior:** Grants access once /verify succeeds and never calls /settle.\n\n**What to watch:** The service is delivered but the merchant is never paid.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/verify-only-no-settle\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 48
    },
    {
      "_id": "req_no-facilitator-check",
      "_type": "request",
      "parentId": "fld_verification-gaps",
      "name": "No verification at all",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/no-facilitator-check",
      "description": "**Expected behavior:** Grants access on the mere presence of a PAYMENT-SIGNATURE header.\n\n**What to watch:** Any non-empty header unlocks the resource.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/no-facilitator-check\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 49
    },
    {
      "_id": "req_trust-client-response",
      "_type": "request",
      "parentId": "fld_verification-gaps",
      "name": "Trusts client-supplied result",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/trust-client-response",
      "description": "**Expected behavior:** Believes a client-asserted payment result without checking the facilitator.\n\n**What to watch:** A client can fabricate a 'paid' claim.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/trust-client-response\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 50
    },
    {
      "_id": "req_fail-open-timeout",
      "_type": "request",
      "parentId": "fld_verification-gaps",
      "name": "Fails open when the facilitator is down",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/fail-open-timeout",
      "description": "**Expected behavior:** Serves the resource anyway when the facilitator is unreachable.\n\n**What to watch:** An availability failure turns into free access.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/fail-open-timeout\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 51
    },
    {
      "_id": "fld_replay-idempotency",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "Replay / Idempotency / Race",
      "metaSortKey": 52
    },
    {
      "_id": "req_replay-after-success",
      "_type": "request",
      "parentId": "fld_replay-idempotency",
      "name": "Replay after success (no binding)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/replay-after-success",
      "description": "**Expected behavior:** Once a payment settles, the same payload re-serves the resource forever with no re-settle.\n\n**What to watch:** Pay once, fetch many — call it twice with the same wallet.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/replay-after-success\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 53
    },
    {
      "_id": "req_serve-before-settle",
      "_type": "request",
      "parentId": "fld_replay-idempotency",
      "name": "Serves before settlement (verify/settle gap)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/serve-before-settle",
      "description": "**Expected behavior:** Returns 200 immediately and settles in the background.\n\n**What to watch:** The resource leaves before the charge is confirmed.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/serve-before-settle\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 54
    },
    {
      "_id": "fld_web-http-layer",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "Web / HTTP Layer",
      "metaSortKey": 55
    },
    {
      "_id": "req_cors-hides-headers",
      "_type": "request",
      "parentId": "fld_web-http-layer",
      "name": "CORS hides payment headers",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/cors-hides-headers",
      "description": "**Expected behavior:** Does not expose the PAYMENT-REQUIRED and PAYMENT-RESPONSE headers via CORS.\n\n**What to watch:** Browser clients cannot read the challenge or the receipt.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/cors-hides-headers\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 56
    },
    {
      "_id": "req_head-leak",
      "_type": "request",
      "parentId": "fld_web-http-layer",
      "name": "HEAD reveals paid metadata",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/head-leak",
      "description": "**Expected behavior:** A HEAD request returns 200 with a leak header and no payment.\n\n**What to watch:** Try curl -I against this path.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/head-leak\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 57
    },
    {
      "_id": "fld_schemes",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "Schemes (exact / upto / batch)",
      "metaSortKey": 58
    },
    {
      "_id": "req_upto-correct",
      "_type": "request",
      "parentId": "fld_schemes",
      "name": "upto: settles actual usage",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/upto-correct",
      "description": "**Expected behavior:** Authorizes a maximum but settles only the actual usage (~60%).\n\n**What to watch:** settledAmount is below the authorized max.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/upto-correct -H 'Content-Type: application/json' -d '{\"tokens\":600}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"tokens\": 600\n}"
      },
      "metaSortKey": 59
    },
    {
      "_id": "req_upto-charges-max",
      "_type": "request",
      "parentId": "fld_schemes",
      "name": "upto: always charges the max",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/upto-charges-max",
      "description": "**Expected behavior:** Settles the full authorized max even when usage is lower.\n\n**What to watch:** The buyer overpays for light usage.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/upto-charges-max -H 'Content-Type: application/json' -d '{\"tokens\":10}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"tokens\": 10\n}"
      },
      "metaSortKey": 60
    },
    {
      "_id": "req_upto-override-exceeds-max",
      "_type": "request",
      "parentId": "fld_schemes",
      "name": "upto: override exceeds the max",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/upto-override-exceeds-max",
      "description": "**Expected behavior:** Sets the settlement amount above the authorized maximum.\n\n**What to watch:** The server tries to take more than the client allowed.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/upto-override-exceeds-max -H 'Content-Type: application/json' -d '{\"tokens\":5000}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"tokens\": 5000\n}"
      },
      "metaSortKey": 61
    },
    {
      "_id": "req_upto-zero-free",
      "_type": "request",
      "parentId": "fld_schemes",
      "name": "upto: settles zero (free)",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/upto-zero-free",
      "description": "**Expected behavior:** A settlement override of 0 gives the service away by accident.\n\n**What to watch:** A paid scheme yields zero revenue.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/upto-zero-free -H 'Content-Type: application/json' -d '{\"tokens\":600}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"tokens\": 600\n}"
      },
      "metaSortKey": 62
    },
    {
      "_id": "req_batch-settlement-correct",
      "_type": "request",
      "parentId": "fld_schemes",
      "name": "batch-settlement: deposit, then reconcile usage",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/batch-settlement-correct",
      "description": "**Expected behavior:** Advertises the batch-settlement scheme: the client authorizes a 5x deposit, and the server settles only the actual (much lower) usage.\n\n**What to watch:** settledAmount is far below authorizedDeposit, and reconciled is true.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/batch-settlement-correct -H 'Content-Type: application/json' -d '{\"calls\":3}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"calls\": 3\n}"
      },
      "metaSortKey": 63
    },
    {
      "_id": "req_batch-settlement-overcharge-deposit",
      "_type": "request",
      "parentId": "fld_schemes",
      "name": "batch-settlement: settles beyond the deposit",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/batch-settlement-overcharge-deposit",
      "description": "**Expected behavior:** Settles more than the deposit the client authorized under the batch scheme.\n\n**What to watch:** Settlement exceeds authorizedDeposit — the facilitator should reject the overcharge.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/batch-settlement-overcharge-deposit -H 'Content-Type: application/json' -d '{\"calls\":3}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"calls\": 3\n}"
      },
      "metaSortKey": 64
    },
    {
      "_id": "req_batch-settlement-never-reconciles",
      "_type": "request",
      "parentId": "fld_schemes",
      "name": "batch-settlement: never reconciles down",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/batch-settlement-never-reconciles",
      "description": "**Expected behavior:** Holds the full authorized deposit and never settles the lower real usage.\n\n**What to watch:** settledAmount equals authorizedDeposit and reconciled is false — the buyer overpays.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/batch-settlement-never-reconciles -H 'Content-Type: application/json' -d '{\"calls\":1}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"calls\": 1\n}"
      },
      "metaSortKey": 65
    },
    {
      "_id": "req_client-scheme-mismatch",
      "_type": "request",
      "parentId": "fld_schemes",
      "name": "exact: canonical scheme identifier (client sends the wrong one)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/client-scheme-mismatch",
      "description": "**Expected behavior:** A fully compliant exact endpoint. The scheme identifier in the payment payload MUST be the canonical \"exact\" — a client that instead sends a non-canonical name like \"exact-evm\" is rejected by the facilitator with invalid_exact_evm_scheme even though its signature recovers a valid payer.\n\n**What to watch:** Pay with the canonical scheme \"exact\" and it settles. Send scheme:\"exact-evm\" and the facilitator returns 402 with PAYMENT-RESPONSE invalidReason \"invalid_exact_evm_scheme\" and the recovered payer — the fix is on the client.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/client-scheme-mismatch\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 66
    },
    {
      "_id": "fld_multi-network",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "Multi-Network Selection (MCP)",
      "metaSortKey": 67
    },
    {
      "_id": "req_multi-network-accepts",
      "_type": "request",
      "parentId": "fld_multi-network",
      "name": "Genuine multi-entry accepts (match by network)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/multi-network-accepts",
      "description": "**Expected behavior:** Advertises two EVM entries — Base Sepolia first, Radius testnet second — so the client must match by network instead of taking accepts[0].\n\n**What to watch:** A correct client skips accepts[0] (Base Sepolia) and pays the eip155:72344 entry.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/multi-network-accepts\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 68
    },
    {
      "_id": "req_svm-requirement",
      "_type": "request",
      "parentId": "fld_multi-network",
      "name": "SVM-only requirement (solana:*)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/svm-requirement",
      "description": "**Expected behavior:** Advertises only a Solana (solana:*) requirement, which an EVM testnet client cannot satisfy.\n\n**What to watch:** An EVM wallet finds no compatible entry; surfaces SVM network selection.\n\n**Status:** Quirk — responsible party if it misbehaves: Network / Chain\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/svm-requirement\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 69
    },
    {
      "_id": "req_cross-vm-accepts",
      "_type": "request",
      "parentId": "fld_multi-network",
      "name": "Cross-VM accepts (EVM and SVM together)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/cross-vm-accepts",
      "description": "**Expected behavior:** Advertises a Solana entry and a Radius testnet EVM entry together, forcing the client to select the VM and network it can settle on.\n\n**What to watch:** A correct client picks the EVM eip155:72344 entry and ignores the solana:* one.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/cross-vm-accepts\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 70
    },
    {
      "_id": "fld_client-policy",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "Client Policy Gate (MCP)",
      "metaSortKey": 71
    },
    {
      "_id": "req_overpriced-vs-cap",
      "_type": "request",
      "parentId": "fld_client-policy",
      "name": "Overpriced vs per-call cap",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/overpriced-vs-cap",
      "description": "**Expected behavior:** Advertises a price far above a sane per-call cap that an MCP policy gate would enforce.\n\n**What to watch:** A max-amount policy check rejects this before signing; a capless client overpays.\n\n**Status:** Quirk — responsible party if it misbehaves: Client\n**Price:** 1 SBC (1000000 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/overpriced-vs-cap\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 72
    },
    {
      "_id": "req_resource-host-mismatch",
      "_type": "request",
      "parentId": "fld_client-policy",
      "name": "Resource host mismatch",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/resource-host-mismatch",
      "description": "**Expected behavior:** The advertised resource origin differs from the server actually being called.\n\n**What to watch:** An expected-resource-server policy check rejects the mismatched origin before signing.\n\n**Status:** Quirk — responsible party if it misbehaves: Client\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/resource-host-mismatch\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 73
    },
    {
      "_id": "req_tool-operation-mismatch",
      "_type": "request",
      "parentId": "fld_client-policy",
      "name": "Tool / operation mismatch",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/tool-operation-mismatch",
      "description": "**Expected behavior:** The requirement authorizes a different, more privileged tool than the one being requested.\n\n**What to watch:** A tool-name binding check rejects the requirement before signing.\n\n**Status:** Quirk — responsible party if it misbehaves: Client\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/tool-operation-mismatch\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 74
    },
    {
      "_id": "req_session-price-escalation",
      "_type": "request",
      "parentId": "fld_client-policy",
      "name": "Session price escalation",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/session-price-escalation",
      "description": "**Expected behavior:** The price climbs call over call (1x, 2x, 3x...) to defeat a per-session spend limit.\n\n**What to watch:** Each call may slip under a per-call cap, but a per-session budget check catches the running total.\n\n**Status:** Quirk — responsible party if it misbehaves: Client\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/session-price-escalation\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 75
    },
    {
      "_id": "fld_facilitator",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "Facilitator Dependency",
      "metaSortKey": 76
    },
    {
      "_id": "req_dead-facilitator",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Dead facilitator URL",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/dead-facilitator",
      "description": "**Expected behavior:** Points /verify and /settle at a facilitator host that does not exist.\n\n**What to watch:** Returns 502 — the payment can never complete.\n\n**Status:** Quirk — responsible party if it misbehaves: Facilitator\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/dead-facilitator\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 77
    },
    {
      "_id": "req_unsupported-network-facilitator",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Facilitator can't support the network",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/unsupported-network-facilitator",
      "description": "**Expected behavior:** Advertises a network the facilitator does not handle.\n\n**What to watch:** Verify fails with an unsupported-network error.\n\n**Status:** Quirk — responsible party if it misbehaves: Facilitator\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/unsupported-network-facilitator\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 78
    },
    {
      "_id": "req_facilitator-rate-limited",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Facilitator rate-limits /verify (429 → misclassified 402)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/facilitator-rate-limited",
      "description": "**Expected behavior:** The facilitator returns 429 during /verify; the merchant misclassifies it as a payment failure and returns 402 instead of 503 + Retry-After.\n\n**What to watch:** The client sees 402 and thinks its payment is invalid — it cannot tell a rate limit from a real rejection.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/facilitator-rate-limited\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 79
    },
    {
      "_id": "req_facilitator-soft-down-503",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Facilitator temporarily unavailable (503)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/facilitator-soft-down-503",
      "description": "**Expected behavior:** The facilitator is reachable but returns 503 Service Unavailable — it is not a dead URL, just temporarily down.\n\n**What to watch:** Returns 502. Unlike a dead-facilitator connection error, the facilitator answered; it is temporarily unable to process payments.\n\n**Status:** Quirk — responsible party if it misbehaves: Facilitator\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/facilitator-soft-down-503\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 80
    },
    {
      "_id": "req_facilitator-settle-500",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Settle returns 500 (ambiguous paid state)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/facilitator-settle-500",
      "description": "**Expected behavior:** /verify succeeds but /settle returns 500 Internal Server Error, leaving it unknown whether the payment landed on-chain.\n\n**What to watch:** Returns 502. The client cannot safely retry with the same permit — the charge might already be confirmed on-chain.\n\n**Status:** Quirk — responsible party if it misbehaves: Facilitator\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/facilitator-settle-500\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 81
    },
    {
      "_id": "req_facilitator-missing-txhash",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Settle succeeds without txHash",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/facilitator-missing-txhash",
      "description": "**Expected behavior:** /settle reports success: true but omits every transaction-hash field; the PAYMENT-RESPONSE receipt carries no on-chain proof.\n\n**What to watch:** Returns 200 but the PAYMENT-RESPONSE header has no txHash — the client cannot verify the settlement on-chain.\n\n**Status:** Quirk — responsible party if it misbehaves: Facilitator\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/facilitator-missing-txhash\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 82
    },
    {
      "_id": "req_facilitator-non-json-leaks",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Non-JSON facilitator response leaked in 402",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/facilitator-non-json-leaks",
      "description": "**Expected behavior:** The facilitator returns an HTML maintenance page instead of JSON; the merchant forwards the raw HTML in the 402 response body, leaking internal infrastructure details.\n\n**What to watch:** The 402 body contains a raw HTML error page with internal build tags and server identifiers.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/facilitator-non-json-leaks\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 83
    },
    {
      "_id": "req_facilitator-schema-drift",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Schema drift: valid vs isValid (loose check grants)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/facilitator-schema-drift",
      "description": "**Expected behavior:** The facilitator returns { valid: true } instead of the spec's { isValid: true }; the merchant's loose field-name check grants access on the wrong key.\n\n**What to watch:** Returns 200 despite the field-name mismatch — a compliant client relying on isValid would have denied access.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/facilitator-schema-drift\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 84
    },
    {
      "_id": "req_facilitator-no-verify-timeout",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "No timeout on /verify (hangs indefinitely)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/facilitator-no-verify-timeout",
      "description": "**Expected behavior:** The merchant's /verify fetch has no AbortController or timeout; when the facilitator is slow the handler ties up the connection forever.\n\n**What to watch:** The request hangs — no response arrives. You will need to Ctrl+C or wait for your client's own timeout to fire.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/facilitator-no-verify-timeout\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 85
    },
    {
      "_id": "req_facilitator-wrong-payto-at-settle",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Wrong payTo used at settle time",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/facilitator-wrong-payto-at-settle",
      "description": "**Expected behavior:** The merchant calls /settle with a payTo address different from the one advertised in the challenge; the facilitator rejects it because the payment was signed for a different recipient.\n\n**What to watch:** Returns 402. The facilitator rejects the mismatched payTo — funds would have gone to the wrong address if the call had succeeded.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/facilitator-wrong-payto-at-settle\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 86
    },
    {
      "_id": "req_facilitator-already-settled-grants",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Grants access despite settle failure",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/facilitator-already-settled-grants",
      "description": "**Expected behavior:** When /settle returns a failure (e.g., already used), the merchant grants access anyway — a replay attacker can reuse any previously-rejected permit for free.\n\n**What to watch:** Returns 200 even though settle failed. The merchant is giving away the resource without confirmed payment.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/facilitator-already-settled-grants\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 87
    },
    {
      "_id": "req_facilitator-settle-concurrent-race",
      "_type": "request",
      "parentId": "fld_facilitator",
      "name": "Concurrent settle race (second racer gets 402)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/facilitator-settle-concurrent-race",
      "description": "**Expected behavior:** Two concurrent requests carry the same PAYMENT-SIGNATURE; without a per-permit lock the merchant lets both race to /settle. The facilitator accepts only one — the second racer is charged but gets a confusing 402.\n\n**What to watch:** Returns 402 with an 'already used' detail — the client paid but the second concurrent call lost the settle race.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/facilitator-settle-concurrent-race\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 88
    },
    {
      "_id": "fld_paid-but-denied",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "Paid-but-Denied / Unpaid-Service",
      "metaSortKey": 89
    },
    {
      "_id": "req_settle-then-fail",
      "_type": "request",
      "parentId": "fld_paid-but-denied",
      "name": "Settles, then the handler fails",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/settle-then-fail",
      "description": "**Expected behavior:** The payment settles on-chain, then the handler returns 500.\n\n**What to watch:** The buyer is charged but receives nothing — check the txHash.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/settle-then-fail\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 90
    },
    {
      "_id": "req_missing-payment-response",
      "_type": "request",
      "parentId": "fld_paid-but-denied",
      "name": "Success without PAYMENT-RESPONSE",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/missing-payment-response",
      "description": "**Expected behavior:** Settles and returns 200 but omits the PAYMENT-RESPONSE header.\n\n**What to watch:** The client cannot read its settlement receipt.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/missing-payment-response\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 91
    },
    {
      "_id": "req_mpp-paid-denied",
      "_type": "request",
      "parentId": "fld_paid-but-denied",
      "name": "MPP paid-but-denied (403 after valid credential)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/mpp/mpp-paid-denied",
      "description": "**Expected behavior:** Accepts a structurally valid push credential but returns 403 Forbidden with a Payment-Receipt failure header. The payment credential was consumed without delivering the resource.\n\n**What to watch:** Returns 403 with Payment-Receipt even after a correct credential is submitted.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/mpp/mpp-paid-denied\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 92
    },
    {
      "_id": "fld_edge-cdn",
      "_type": "request_group",
      "parentId": "wrk_x402_marketplace",
      "name": "Edge / CDN Controls",
      "metaSortKey": 93
    },
    {
      "_id": "req_edge-correct-headers",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "Correct edge cache headers (compliant)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/edge-correct-headers",
      "description": "**Expected behavior:** The 402 challenge is no-store; the paid 200 is private, no-store with Vary: PAYMENT-SIGNATURE — and it still does a real verify and settle.\n\n**What to watch:** curl -i: the 402 carries Cache-Control: no-store; the paid 200 is private and Vary.\n\n**Status:** Compliant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/edge-correct-headers\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 94
    },
    {
      "_id": "req_edge-cacheable-challenge",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "Cacheable 402 challenge",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/edge-cacheable-challenge",
      "description": "**Expected behavior:** Sends the 402 with Cache-Control: public, max-age, so a shared cache stores and replays a stale challenge.\n\n**What to watch:** curl -i: the 402 carries public, max-age=300; the nonce, quote, and price go stale in cache.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/edge-cacheable-challenge\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 95
    },
    {
      "_id": "req_edge-cacheable-paid",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "Cacheable paid response (shared cache)",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/edge-cacheable-paid",
      "description": "**Expected behavior:** Sends the paid 200 publicly cacheable, so a shared edge serves paid content to unpaid clients on the same URL.\n\n**What to watch:** curl -i: the paid 200 carries public, max-age — a paywall bypass via the CDN.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/edge-cacheable-paid\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 96
    },
    {
      "_id": "req_edge-missing-vary",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "Missing Vary on payment",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/edge-missing-vary",
      "description": "**Expected behavior:** Caches the paid 200 but ignores the payment header in the cache key (no Vary), so one payer's response is served to another.\n\n**What to watch:** curl -i: public, max-age with NO Vary header on the paid 200.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/edge-missing-vary\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 97
    },
    {
      "_id": "req_edge-swr-leak",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "stale-while-revalidate leak",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/edge-swr-leak",
      "description": "**Expected behavior:** A stale-while-revalidate directive lets the edge serve cached protected content without payment during revalidation.\n\n**What to watch:** curl -i: the paid 200 carries stale-while-revalidate — protected content is served stale and unpaid.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/edge-swr-leak\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 98
    },
    {
      "_id": "req_edge-oversized-header",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "Oversized challenge header",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/edge-oversized-header",
      "description": "**Expected behavior:** Pads the PAYMENT-REQUIRED header beyond common proxy header-size caps, so an edge truncates, drops, or 431s it.\n\n**What to watch:** curl -i: the PAYMENT-REQUIRED header is over 12KB — a proxy may strip it before the client sees it.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/edge-oversized-header\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 99
    },
    {
      "_id": "req_edge-conditional-304",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "Conditional 304 replay",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/edge-conditional-304",
      "description": "**Expected behavior:** The paid resource carries an ETag, and a later conditional request is answered 304 from cache without re-payment.\n\n**What to watch:** The first paid call returns an ETag; a replay with -H 'If-None-Match: \"paid-resource-v1\"' (no payment) returns 304.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/edge-conditional-304\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 100
    },
    {
      "_id": "req_edge-rate-limited",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "Rate-limited before payment",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/edge-rate-limited",
      "description": "**Expected behavior:** Returns 429 (short Retry-After, no challenge) before the 402, so a willing payer can't tell a rate limit from a paywall.\n\n**What to watch:** curl -i (no payment): 429 with Retry-After and no PAYMENT-REQUIRED header.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/edge-rate-limited\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 101
    },
    {
      "_id": "req_edge-waf-blocks-payment",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "WAF blocks the payment payload",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/edge-waf-blocks-payment",
      "description": "**Expected behavior:** The large base64 PAYMENT-SIGNATURE trips a managed WAF rule and is rejected with 403 before the payment logic runs.\n\n**What to watch:** The paid call returns 403 (WAF) instead of verifying — the payment never reaches the origin logic.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/edge-waf-blocks-payment\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 102
    },
    {
      "_id": "req_edge-body-too-large",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "Body too large (413)",
      "method": "POST",
      "url": "http://127.0.0.1:8080/api/x402/edge-body-too-large",
      "description": "**Expected behavior:** A paid POST is rejected by a small edge body cap with 413 before reaching the payment logic.\n\n**What to watch:** The paid POST returns 413 before any verify or settle — the edge body limit fires first.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 post http://127.0.0.1:8080/api/x402/edge-body-too-large -H 'Content-Type: application/json' -d '{\"query\":\"radius\"}'\n```",
      "headers": [
        {
          "name": "Content-Type",
          "value": "application/json"
        }
      ],
      "body": {
        "mimeType": "application/json",
        "text": "{\n  \"query\": \"radius\"\n}"
      },
      "metaSortKey": 103
    },
    {
      "_id": "req_edge-timeout-settle",
      "_type": "request",
      "parentId": "fld_edge-cdn",
      "name": "Edge timeout during settle",
      "method": "GET",
      "url": "http://127.0.0.1:8080/api/x402/edge-timeout-settle",
      "description": "**Expected behavior:** Settlement is slow and the edge returns 504 while the charge may have completed on-chain — an ambiguous paid state.\n\n**What to watch:** The paid call returns 504 after a valid verify — the charge may still settle on-chain.\n\n**Status:** Quirk — responsible party if it misbehaves: Merchant\n**Price:** 0.0001 SBC (100 atomic units)\n\nImporting this request demonstrates the endpoint and surfaces the 402 challenge. To actually pay and receive the 200 resource, run it with radius-cli (the only client that can sign an x402 payment):\n\n```\nradius-cli --network testnet wallet x402 get http://127.0.0.1:8080/api/x402/edge-timeout-settle\n```",
      "headers": [],
      "body": {},
      "metaSortKey": 104
    }
  ]
}