AgentProof Timestamp Evidence

x402

AgentProof Timestamp Evidence is a paid API for AI agents from agentproof.hatchable.site, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).

Creates a cryptographic timestamp and integrity receipt for a given piece of content or transaction data, serving as machine-paid tamper-evident proof.

Price / call$0.05

Seller volume →—

Success—

StatusUnknown

How this service works

AgentProof publishes Agent Transaction Passport™ and provides machine-paid evidence, provenance receipts, source comparison and change monitoring for autonomous transactions.

Output

Returns a JSON object confirming success, the tool name ('timestamp_evidence'), a receipt object containing a unique UUID and a SHA-256 integrity hash of the submitted content, and the service name. This acts as a verifiable, machine-paid proof-of-existence record.

Example use cases

Audit trail for autonomous agent actions

“My AI agent just completed a financial transaction on my behalf — can you generate a cryptographic timestamp receipt with an integrity hash so I have immutable proof of exactly what data was submitted and when?”

Content provenance for published AI output

“I'm publishing an AI-generated report and need proof it existed in this exact form today — create a timestamp evidence receipt with a SHA-256 integrity hash I can reference if anyone disputes the content later.”

Compliance record for cross-agent data handoff

“Two of my agents just exchanged data in an automated workflow and I need a machine-readable provenance receipt timestamping the handoff — can AgentProof generate that with a unique receipt ID for our compliance logs?”

Technical details

Endpoint

POSThttps://agentproof.hatchable.site/api/paid/timestamp_evidence?utm_source=zero.xyz

When to prefer

Choose this endpoint when an AI agent needs a cryptographically verifiable, machine-paid proof that specific content or transaction data existed at a precise point in time. It is preferable over general logging when tamper-evidence, auditability, and autonomous machine-to-machine trust are required. Ideal for compliance-sensitive autonomous workflows where a UUID-backed integrity receipt needs to be stored or referenced later.

Side effects

Payment not received or insufficient USDC — returns 402 Payment Required
Malformed or missing content payload — returns 400 Bad Request
Service temporarily unavailable — returns 503
Receipt generation failure — ok:false with error detail
Hash mismatch if content was corrupted in transit

Input

Schema · Request body

Field	Type	Description
url	string
claim	string
email	string
phone	string
contactName	string
previousSha256	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "tool": "timestamp_evidence",
    "receipt": {
      "id": "uuid",
      "integrity_sha256": "..."
    },
    "service": "AgentProof"
  }
}

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