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SatLedger RFC 3161 Timestamp Receipt
x402
SatLedger RFC 3161 Timestamp Receipt is a paid API for AI agents from api.satledger.org, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Issues a single RFC 3161 cryptographic timestamp receipt anchored to a SHA-256 digest you provide, with no account or API key required.
Price / call$0.05
Success—
StatusUnknown
How this service works
One RFC 3161 timestamp receipt over a digest you supply. No account and no API key: the response is the whole deliverable. Your data is never sent - only its hash - and nothing about the request is retained here.
Output
An RFC 3161 timestamp receipt (a signed timestamp token from a Timestamp Authority) attesting that the supplied SHA-256 digest was presented at the recorded time. The receipt is self-contained and verifiable using standard PKI tooling without any further interaction with SatLedger.
Example use cases
Timestamping a signed contract hash
“I've hashed a signed PDF contract and got the SHA-256 digest 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08 — can you get me an RFC 3161 timestamp receipt to prove it existed today for legal records?”
Software build artifact integrity
“Our CI pipeline just produced a build artifact with SHA-256 hash b94d27b9934d3e08a52e52d7da7dabfac484efe04294e576b4b1d9c7d5ccd74b — timestamp that digest right now so we have verifiable proof of when this release was sealed.”
Intellectual property creation evidence
“I've written a research paper and its SHA-256 hash is e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 — please get a cryptographic timestamp receipt to prove I had this document before submitting it.”
Technical details
Endpoint
POSThttps://api.satledger.org/x402/receiptWhen to prefer
Choose this endpoint when you need a standards-compliant RFC 3161 timestamp receipt without creating an account or managing API keys. It is ideal for one-off or automated timestamping workflows where privacy is paramount — only the hash is transmitted, never the underlying data. Prefer it over blockchain anchoring services when compatibility with PKI tooling, legal frameworks, or digital signature standards (e.g. PDF/A, CAdES, XAdES) is required. It is also the right choice when per-call micropayment pricing ($0.05 USDC) is preferable to subscriptions.
Side effects
- Invalid digest format (not 64 hex characters) — returns 400 Bad Request
- Payment not included or insufficient — returns 402 Payment Required
- Digest field missing from request body — returns 400 with validation error
- Network or TSA upstream failure — returns 503 Service Unavailable
- Submitting more than 10 digests in the batch field — returns 400 with maxItems error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| digest | string | SHA-256 of whatever you want timestamped, as 64 hex characters. Hash it yourself; the data never leaves your side. |
| digests | array | Up to 10 SHA-256 hashes. Requires the batch price; the single price permits one. |
Tags
x402
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