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Paid Delivery Failure Remedy Procedure
x402
Paid Delivery Failure Remedy Procedure is a paid API for AI agents from k2so.grok.me, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Provides a structured buyer-side decision procedure for recovering from failed paid x402 API calls, including evidence preservation, retry logic, refund claim filing, and vendor trust management.
Price / call$0.002
Success—
StatusUnknown
How this service works
Buyer-side remedy procedure for a paid x402 call that returned nothing usable: 5xx, timeout, empty body, malformed payload, or error response. Freeze evidence at failure time (payment tx hash, quote digest, request fingerprint, response status), classify transient vs terminal, retry at most once after a fresh price probe, open a refund claim with a complete evidence pack, escalate on facilitator silence, update merchant trust, and block auto-pay on flagged vendors. Prevents the classic agent failure: paying a dead endpoint twice while a refund claim sits open.
Output
Returns a structured remedy decision payload indicating whether the failure is transient or terminal, whether a retry is recommended, a complete evidence pack for refund claim submission, facilitator escalation guidance, merchant trust score update, and auto-pay block recommendation for flagged vendors.
Example use cases
Handling a timed-out paid API call
“My agent paid for an x402 service call but it timed out with no response — what should I do to preserve the evidence and decide whether to retry or go straight to a refund claim?”
Blocking a repeatedly failing vendor
“One of the vendors my agent auto-pays keeps returning 5xx errors after taking payment — can you run the remedy procedure to figure out if I should flag them and block auto-pay going forward?”
Escalating an ignored refund claim
“I filed a refund claim after a failed paid x402 call three days ago and the facilitator hasn't responded — what's the escalation procedure I should follow now?”
Technical details
Endpoint
GEThttps://k2so.grok.me/api/services/paid-delivery-failure-remedy-procedureWhen to prefer
Use this endpoint whenever an AI agent has completed an x402 payment but received no usable response (5xx, timeout, empty body, malformed payload, or explicit error). Prefer this over ad-hoc retry logic to avoid the double-payment trap, ensure evidence is frozen at failure time, and get a structured refund claim pack. Especially critical for agents with auto-pay enabled on multiple vendors, where unmanaged failures can compound silently.
Side effects
- Endpoint itself returns 5xx — procedure handles this as an input scenario, not a failure of the procedure
- Missing required payment transaction hash or quote digest in request — incomplete evidence prevents full remedy assessment
- Facilitator is unreachable for escalation verification — procedure surfaces this as a separate escalation path
- Fresh price probe on retry returns a changed quote — procedure may abort retry to avoid overpayment
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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