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AOTrust Notarization API
x402
AOTrust Notarization API is a paid API for AI agents from api.aotrust.link, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Notarizes an agent payload by cryptographically signing it and returning a signed Payload Data Receipt (PDR)
Price / call$0.01
Success—
StatusUnknown
How this service works
Notarize agent payload. Returns signed PDR.
Output
A signed Payload Data Receipt (PDR) — a cryptographic attestation tied to the submitted agent payload, proving its contents at the time of submission and providing a verifiable, tamper-evident record.
Example use cases
Audit trail for autonomous agent actions
“I need to notarize the output my AI agent just produced before storing it — can you send this payload to AOTrust and get back a signed PDR I can attach to the audit log?”
Tamper-proof proof of AI decision
“My agent just made a loan recommendation and I need to prove what data it used at the time — please notarize this payload so I get a signed, timestamped receipt I can keep for compliance.”
Cross-agent payload verification
“Before this agent hands off its result to another agent in the pipeline, I want a signed PDR from AOTrust attesting to the payload contents so the receiving agent can verify it wasn't altered in transit.”
Technical details
Endpoint
POSThttps://api.aotrust.link/notarizeWhen to prefer
Use this endpoint when you need a cryptographically signed, verifiable receipt for an agent payload — especially in multi-agent pipelines, compliance-sensitive workflows, or audit contexts where tamper-evidence and provenance matter. Prefer it over generic logging or storage when you specifically need a signed attestation (PDR) rather than just a record.
Side effects
- Invalid or malformed payload body — 400 error returned
- Payment not attached or insufficient USDC — 402 payment required
- Signature generation failure due to internal key issues — 500 server error
- Network timeout if payload is too large
- Duplicate payload submission may return the same PDR or an error depending on deduplication logic
Tags
x402
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