deliberately brokenx402

Undecodable header

The PAYMENT-REQUIRED header is not valid base64.

Your client should Fail cleanly, and not crash.

The challenge header is not valid base64. Your client should fail cleanly, not crash.

Your endpointUndecodable header

/api/x402?quirk=bad-base64

Try it

curl -i "https://test402.com/api/x402?quirk=bad-base64"

Returns 402 whose challenge header will not decode -- PAYMENT-REQUIRED for x402, the MPP request param for MPP.

Response it will return (HTTP 402)

PAYMENT-REQUIRED: !!!not-base64!!!

{
  "note": "test402 scenario. quirk=bad-base64",
  "error": "Payment required"
}