PAYMENT_FAILED

The payment verified but could not be settled.

HTTP status	402
Group	x402
Retryable	No — sending it again changes nothing

What happened

Settlement failed on chain — for example the venue was paused or the transfer reverted.

What to do

Request a fresh challenge and pay again. Read the changelog and status page if it repeats.

The problem document

Every error is application/problem+json (RFC 9457) with the same shape:

{
  "type": "https://docs.co-relayer.com/errors/payment-failed",
  "title": "The payment verified but could not be settled.",
  "status": 402,
  "detail": "A sentence about this specific occurrence.",
  "instance": "req_01JB…",
  "code": "PAYMENT_FAILED",
  "retryable": false,
  "hint": "Request a fresh challenge and pay again. Read the changelog and status page if it repeats."
}

See the error model for what each member means and how to handle unknown codes.