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TaskHawk Kevros Provenance Attestation
x402
TaskHawk Kevros Provenance Attestation is a paid API for AI agents from governance.taskhawktech.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-12).
Creates a hash-chained attestation record proving what an agent did, linking each action into a verifiable provenance chain
Price / call$0.02
Success—
StatusUnknown
How this service works
Prove what you did — hash-chained provenance attestation
Output
Returns a JSON object containing the current action's hash (hash_curr), the previous chain link hash (hash_prev, all zeros if first entry), the cumulative chain_length, and a unique attestation_id — together proving the action's place in an immutable provenance chain.
Example use cases
Example prompt
“Record a hash-chained provenance attestation for agent 'agent_xyz' proving it just executed a data transfer action — the action description is 'transferred 500 records from source DB to destination warehouse'.”
Technical details
Endpoint
POSThttps://governance.taskhawktech.com/governance/attest?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need cryptographic, hash-chained proof of what an AI agent did — not just a log entry, but a verifiable provenance record where each action is linked to the previous one. Ideal for compliance, audit trails, multi-step agent workflows requiring tamper-evident records, or when downstream systems need to verify agent behavior. Prefer this over generic logging when the integrity and unchainability of the record matters.
Side effects
- Missing agent_id returns 400 with validation error
- Malformed action_payload object returns 400
- Chain integrity failure if prior hash is corrupted returns 500
- Payment not received returns 402 requiring x402 micropayment of $0.02 USDC
- Service unavailable returns 503 if hashing backend is down
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "json",
"example": {
"hash_curr": "a1b2c3d4e5f6...",
"hash_prev": "0000000000000000",
"chain_length": 1,
"attestation_id": "att_001"
}
}Tags
x402
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