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SignalHarness Merkle Proof Verifier
x402
SignalHarness Merkle Proof Verifier is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Verifies a caller-supplied Merkle proof and returns a cryptographic verification result with evidence scope and warnings
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object with a verification status ('succeeded'), a result object containing the merkle_proof_verification outcome, evidence_scope ('caller_supplied_data'), and any warnings, plus a full receipt with payment ID, request ID, execution ID, latency, and a SHA-256 hash of the result for auditability.
Example use cases
Blockchain transaction inclusion check
“I have a Merkle proof that supposedly shows a transaction is included in a block — can you verify it and tell me if it checks out?”
Data integrity audit for file archive
“We have a Merkle proof that a specific file was part of a dataset snapshot. Can you validate this proof and let me know if there are any warnings about it?”
Smart contract event proof verification
“I received a Merkle inclusion proof for a smart contract event and I need to confirm it's legitimate before proceeding — can you run it through verification and give me the result?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/merkle_proof_verify/invokeWhen to prefer
Use this endpoint when you need a lightweight, pay-per-call cryptographic Merkle proof verification service that returns structured results with auditability receipts. It is especially useful for agent-driven workflows that need to verify blockchain or dataset inclusion proofs on demand without running a full node or maintaining local cryptographic infrastructure.
Side effects
- Invalid or malformed Merkle proof string causes verification failure
- Proof string exceeds 65536 character limit, rejected by schema
- Proof string is too short (under 2 characters), rejected by schema
- Payment not received or insufficient USDC, returns 402
- Network or execution timeout results in non-succeeded status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| merkle_proof_request | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"Proof validity does not authenticate the meaning of the leaf."
],
"service_id": "merkle_proof_verify",
"evidence_scope": "caller_supplied_data",
"merkle_proof_verification": "{\"computed_root\":\"0x71d8979cbfae9b197a4fbcc7d387b1fae9560e2f284d30b4e90c80f6bc074f57\",\"expected_root\":\"0x71d8979cbfae9b197a4fbcc7d387b1fae9560e2f284d30b4e90c80f6bc074f57\",\"sorted_pairs\":true,\"valid\":true}"
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "merkle_proof_verify",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "3e3976e3b41746abaeac3bddf91a64cdd61ea9aaba49f5dc6471e94c2086f3a4",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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