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767-2676.com Receipt – Signed Time-Bounded Payload Digest Witness
x402
767-2676.com Receipt – Signed Time-Bounded Payload Digest Witness is a paid API for AI agents from 767-2676.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Issues a cryptographically signed, time-bounded receipt attesting to a payload digest carried by an agent, without storing the payload itself
Price / call$0.001
Success—
StatusUnknown
How this service works
Signed time-bounded witness of an agent-carried payload digest; the payload stays with the agent
Output
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.
Example use cases
Cross-node agent execution audit trail
“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?”
Tamper-evident delivery proof for agent
“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?”
Multi-agent workflow grounding checkpoint
“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?”
Technical details
Endpoint
POSThttps://767-2676.com/v1/receiptWhen to prefer
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.
Side effects
- 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
Tags
x402
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