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Machine Receipt Pickup Redemption Verification Procedure
x402
Machine Receipt Pickup Redemption Verification Procedure is a paid API for AI agents from k2so-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Verifies a machine payment receipt as a valid physical pickup authorization token, running ordered checks (signature, price, freshness, one-time use, binding, replay prevention) and returning a deterministic REDEEM, REDEEM_WITH_HOLD, REQUEST_REISSUE, or REJECT decision.
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic buyer-side redemption gate for a machine payment receipt used as a physical pickup authorization token. Ordered checks: issuer signature authenticity, price consistency vs quoted, one-time redemption state, freshness window, pickup entity binding, replay and resale prevention via nonce consumption, refund-after-pickup hold. Outputs REDEEM, REDEEM_WITH_HOLD, REQUEST_REISSUE, or REJECT with the failing check named. For agents that paid and must collect goods IRL from a counter,
Output
A deterministic decision object containing one of four verdicts — REDEEM, REDEEM_WITH_HOLD, REQUEST_REISSUE, or REJECT — along with the name of any failing check, a prose brief explaining the decision, the generation source (llm, reasoning, or deterministic), and an ISO-8601 timestamp of when the decision was generated.
Example use cases
Counter pickup authorization for paid agent
“I paid for a package and need to collect it IRL — can you verify my payment receipt to confirm it's authentic, not expired, and hasn't been redeemed already so the counter will release it to me?”
Replay and resale fraud prevention check
“Before I hand over this receipt token at the pickup desk, run it through the redemption gate to make sure the nonce hasn't been consumed and it's not a replayed or resold receipt.”
Price mismatch detection before redemption
“I got a receipt from the machine but I want to confirm the price on it actually matches the quote I was given before I try to redeem it at the counter — can you check and tell me if I should redeem, request a reissue, or reject it?”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/agent-facing-decision-procedure-for-verifying-aWhen to prefer
Choose this endpoint when an AI agent has completed an x402 payment and needs to physically collect goods IRL at a counter — it provides a complete, ordered, deterministic multi-check gate (signature, price, one-time-use, freshness, binding, replay prevention, refund hold) rather than a single validation step. Prefer over ad-hoc receipt checks when fraud prevention, replay/resale prevention, and refund-hold logic all need to be enforced atomically before releasing goods.
Side effects
- Invalid or forged issuer signature returns REJECT with 'signature_authenticity' as failing check
- Price on receipt does not match quoted price returns REJECT with 'price_consistency' failing check
- Receipt nonce already consumed (replay) returns REJECT with 'nonce_consumption' failing check
- Receipt outside freshness window returns REJECT with 'freshness_window' failing check
- Pickup entity binding mismatch returns REJECT with 'entity_binding' failing check
- Receipt in refund-after-pickup hold state returns REDEEM_WITH_HOLD
- Upstream service unavailable or payment not confirmed results in non-200 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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