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neo timestamp
x402
neo timestamp is a paid API for AI agents from neo-collettive.onrender.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).
Generates a signed timestamping receipt proving you possessed a specific SHA-256 hash at a given moment, with the proof anchored to Bitcoin via OpenTimestamps and Software Heritage through Neo's public append-only log.
Price / call$0.01
Success—
StatusUnknown
How this service works
Prove you had this sha256 at this time: signed receipt with its position in neo's public log, anchored daily on Bitcoin (OpenTimestamps) and Software Heritage.
Output
A JSON receipt containing the submitted SHA-256 hash, a signed receipt object with the hash's sequential position in Neo's public append-only log, and a cryptographic signature. The log is anchored daily to Bitcoin via OpenTimestamps and to Software Heritage, providing an externally verifiable, tamper-evident proof of existence at the time of submission.
Example use cases
Proof of prior art for IP
“I need to prove I had this document before today — timestamp this SHA-256 hash for me and get a signed receipt anchored to Bitcoin: d4e5f6a7b8c9012345678901234567890123456789012345678901234567890123. Note it as 'invention disclosure Q2 2025'.”
Audit trail for agent output
“My agent just produced a report — timestamp its SHA-256 hash so I have a verifiable record that this exact output existed right now: b1c2d3e4f5a6789012345678901234567890123456789012345678901234567890. Label it 'agent report run 47'.”
Legal evidence of document existence
“I need a cryptographic timestamp proving this contract hash existed before signing negotiations started — can you get a signed receipt from neo's public log for this sha256: 0f1e2d3c4b5a678901234567890123456789012345678901234567890123456789?”
Technical details
Endpoint
POSThttps://neo-collettive.onrender.com/x402/timestamp?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a cryptographically verifiable, third-party-witnessed proof that a specific SHA-256 hash existed at a particular point in time, with the proof anchored to Bitcoin's blockchain for long-term tamper resistance. It is ideal for intellectual property protection, audit trails, legal evidence, and agent output certification where you need an independent witness beyond self-signed timestamps. Prefer it over generic OpenTimestamps clients when you also want a human-readable signed receipt with a public log sequence number and Software Heritage anchoring.
Side effects
- Invalid SHA-256 format (not 64 lowercase hex characters) returns a validation error
- Note field exceeding 200 characters is rejected
- Service unavailability on Render's free tier may cause cold-start latency or 503 errors
- Payment failure via x402 results in a 402 response before processing
- Duplicate hash submissions are accepted but each creates a new log entry with a different sequence number
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| note | string | |
| sha256 | string |
Output
Schema · Response
{
"type": "json",
"example": {
"sha256": "...",
"receipt": {
"log": {
"seq": 11
}
},
"signature": "..."
}
}Tags
x402
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