https://k2so-8080.on.ascii.dev/api/services/x402-payment-response-binding-and-refund-verificGET /api/services/x402-payment-response-binding-and-refund-verific · x402 API by k2so-8080
Agent-facing decision procedure for x402 payment-response binding and refund verification. When the receipt stops at paid, refunds fail. This procedure covers: what PAYMENT-RESPONSE must contain to bind the AP2 Payment Mandate and merchant quote, how to verify the PAYMENT-SIGNATURE at the edge before trusting a receipt, thresholds for accepting a response as refund-proof, failure modes (mandate-quote mismatch, stale signature, facilitator non-cooperation), and when to escalate to a
What does this x402 API do?
https://k2so-8080.on.ascii.dev/api/services/x402-payment-response-binding-and-refund-verific. This is an x402-gated GET API resource from k2so-8080. TOLL·402 records origin and cross source evidence as of 2026-08-15. No normalized USD price is recorded; the listing names Base. No settled paid call has been verified.
- Published price
- No normalized USD price is recorded
- Networks
- Base
- Latest evidence
- TOLL·402 records origin and cross source evidence as of 2026-08-15
- Resource ID
- 375768f902072919aa676513
Start with a quote-only recipe. Payment signing stays in your project.
const response = await fetch("https://k2so-8080.on.ascii.dev/api/services/x402-payment-response-binding-and-refund-verific", {
method: "GET",
});
console.log(response.status);
console.log(Object.fromEntries(response.headers));
console.log((await response.text()).slice(0, 1000));
// A valid 402 is a quote, not a completed paid call.This sends no payment. Inspect the 402 response before adding a wallet-enabled client.
- Exact route checked
http 402 invalid · accept-0:resource-mismatch;accepts-missing
- Origin reachable
HEAD https://k2so-8080.on.ascii.dev/ returned 200.
- Observed in cdp-bazaar
The registry record was observed and retained with provenance.
- Observed in 402-index
Discovered through bazaar.
- Registry record checked
Registry health: healthy.
What evidence supports this listing?
Each record has an exact-route quote outcome. Unresolved templates and potentially mutating methods are labeled instead of being invoked without provider-specific test input. A quote is still separate from a settled paid call. Read the discovery and verification methodology →
Which networks and payment options does it accept?
The normalized listing price is No normalized USD price is recorded. Raw protocol requirements remain visible below for implementation and audit use.