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neo log-witness
x402
neo log-witness 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).
Recomputes a hash-chained log's integrity, returning its size and head hash with a signed third-party witness attestation.
Price / call$0.01
Success—
StatusUnknown
How this service works
Recompute a hash-chained log ([seq, ts, kind, item, extra] rows, up to 5000) and get its size and head, signed and logged: a third-party witness line.
Output
A JSON object with ok (boolean), the recomputed head hash of the log, the total log size (number of entries), and a cryptographic signature from neo acting as a third-party witness — serving as an externally-verifiable attestation of the log's integrity at that moment.
Example use cases
Audit trail integrity checkpoint
“I have a sequence of 200 audit log entries in [seq, ts, kind, item, extra] format — can you send them to neo log-witness to recompute the hash chain and get back a signed witness attestation so I can prove nothing was tampered with?”
Append-only log state certification
“My agent system maintains an append-only activity log. After this batch of operations, can you get a third-party witness signature on the current log head and size so I have an external attestation of the log's state at this point?”
Cross-system log continuity proof
“I need to hand off a verified log snapshot to another system — can you use neo log-witness to recompute the hash chain from the starting head 'f7e2b9c1' across these 500 entries and return the signed witness line I can attach as proof of continuity?”
Technical details
Endpoint
POSThttps://neo-collettive.onrender.com/x402/log-witness?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need an independent, cryptographically-signed third-party attestation of a hash-chained log's integrity — not just local verification. Ideal when you need to prove to external parties that a log was intact at a specific moment, for audit trails, compliance checkpoints, or handoffs between systems. Prefer over self-signed solutions when external witness trust is required.
Side effects
- Hash chain recomputation fails if entries are malformed or missing required [seq, ts, kind, item, extra] fields
- Exceeding 5000 entries limit returns an error
- Invalid or mismatched start_head causes chain verification failure
- Network timeout on large entry batches
- Malformed JSON input schema returns 400-level error
- Service unavailability on Render.com hosting platform
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| log | string | |
| entries | array | |
| start_head | string |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"head": "...",
"size": 1,
"signature": "..."
}
}Tags
x402
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