{"uid":"cap_cF4X2loo9iSKtX5Um5o1Y","slug":"767-2676-com-receipt-signed-time-bounded-payload-digest-witness-f9e59e01","name":"767-2676.com Receipt – Signed Time-Bounded Payload Digest Witness","description":"Signed time-bounded witness of an agent-carried payload digest; the payload stays with the agent","url":"https://767-2676.com/v1/receipt","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_nhd3dfh2rL5aSG6DrefJ4","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Issues a cryptographically signed, time-bounded receipt attesting to a payload digest carried by an agent, without storing the payload itself","exampleAgentPrompt":"Create a signed time-bounded receipt attesting to my agent's payload digest — the payload stays with me, I just need the cryptographic witness token to prove it existed within this execution window for audit purposes.","exampleUseCases":[{"title":"Cross-node agent execution audit trail","prompt":"My agent just completed a task across multiple nodes and I need a signed receipt proving what payload it was carrying at the time — can you get a time-bounded cryptographic witness for the digest so we have an audit record without exposing the actual payload?"},{"title":"Tamper-evident delivery proof for agent","prompt":"I need to prove that my agent delivered a specific payload before a deadline — can you generate a signed timestamp receipt for the payload digest so I have verifiable evidence of the execution window?"},{"title":"Multi-agent workflow grounding checkpoint","prompt":"We're running a multi-agent pipeline and need each agent to get a signed witness receipt for its current payload digest at each handoff point — can you request a time-bounded attestation so downstream nodes can verify the execution order?"}],"resultDescription":"A cryptographically signed receipt containing a timestamp, a binding to the provided payload digest, and an expiry bound defining the valid execution window. The payload itself is never transmitted or stored — only the digest is attested. The receipt can be used as bearer evidence for audit, cross-node verification, or grounding of agent execution history.","failureModes":["Invalid or malformed digest format returns a 400 error","Expired or out-of-window timestamp rejected with a 422 error","Payment not included or insufficient USDC balance causes a 402 payment required response","Duplicate receipt requests for the same digest within an execution window may be rejected or deduplicated","Network timeout results in no receipt issued — agent must retry"],"whenToPreferThis":"Use this endpoint when an AI agent needs lightweight cryptographic proof that it carried a specific payload during a given time window, without revealing the payload contents. Ideal for audit trails, cross-node handoff verification, and compliance checkpoints in multi-agent workflows where the payload must remain private but its existence at a point in time must be provable.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:37:41.518Z","isFirstParty":false}