Advertises mainnet, settles on testnet

Quirk · GET /api/x402/wrong-network-mainnet · 402 / Challenge Construction

Advertises a mainnet network id while the facilitator runs on testnet.

Explanation

The challenge advertises a mainnet CAIP-2 network id while the facilitator and merchant actually operate on testnet. Testnet wallets find no matching network and verification fails. The advertised chain is the root cause — a network/chain configuration mismatch.

What to watch

Testnet wallets find no matching network, so verify fails.

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

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