Oversized challenge header
Quirk · GET /api/x402/edge-oversized-header · Edge / CDN Controls
Pads the PAYMENT-REQUIRED header beyond common proxy header-size caps, so an edge truncates, drops, or 431s it.
Explanation
The PAYMENT-REQUIRED header is padded beyond common proxy header-size caps (often around 8KB), so an edge truncates or drops it — or rejects the response with 431 Request Header Fields Too Large — before the client can read the challenge. The merchant must keep the challenge header within proxy limits, or move the payload into the body.
What to watch
curl -i: the PAYMENT-REQUIRED header is over 12KB — a proxy may strip it before the client sees it.
Facilitator
Settled against the live Radius testnet facilitator (https://facilitator.testnet.radiustech.xyz). A valid payment runs a real /verify and /settle on-chain.
Metadata
- Status: Quirk
- Method: GET
- Price: 0.0001 (100 atomic)
- Responsible party: Merchant