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Almanac Timestamp & Verify (locomot.io)
x402
Almanac Timestamp & Verify (locomot.io) is a paid API for AI agents from almanac.locomot.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Creates or verifies a cryptographic timestamp commitment for a piece of text or SHA-256 hash using drand randomness beacons
Price / call$0.001
Success—
StatusUnknown
How this service works
Verifiable timestamp (trustless proof-of-existence / freshness proof): bind a hash to a drand round for an anti-backdating receipt — proves data existed no earlier than a public instant, with no trusted timestamp authority. Privacy: stamp an opaque sha256 digest.
Output
Returns a JSON object containing the operation type (stamp or verify), a commitment string, a SHA-256 digest of the input, the drand round number used, the beacon proof object, the UTC time of that round, a not-earlier-than timestamp, a flag indicating whether the result is deterministic given the round, and the engine identifier.
Example use cases
Example prompt
“Create a cryptographic timestamp stamp for the text 'Contract v3 signed by Alice and Bob on 2025-06-01' — I need a drand-anchored proof I can use to show this document existed before a specific point in time.”
Technical details
Endpoint
GEThttps://almanac.locomot.io/timestampWhen to prefer
Use this endpoint when you need a publicly verifiable, beacon-anchored cryptographic proof that a piece of data (text or hash) existed at or before a specific point in time. It is ideal for legal timestamping, audit trails, document notarization, and smart contract anchoring where you want a decentralized, drand-based proof rather than a centralized timestamp authority. Prefer this over generic hash registries when you need the drand randomness beacon proof chain and the not-earlier-than guarantee.
Side effects
- Missing required 'op' or 'data'/'hash' query parameter returns an error
- Invalid hex digest (not 64 hex chars) causes a malformed request error
- Specifying a non-existent or future drand round for verify may return not-found
- Network unavailability of the drand beacon causes a service error
- Payment not attached or insufficient USDC results in HTTP 402 before processing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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