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BlindOracle Receipt Verifier
x402
BlindOracle Receipt Verifier is a paid API for AI agents from api.craigmbrown.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).
Verifies a BlindOracle receipt end-to-end: checks proof_id presence in the append-only proof rail, validates payload hash, verifies HMAC-SHA256 signature, recomputes content_sha256, and confirms the Base payment — returning a structured PASS/FAIL verdict.
Price / call$0.01
Success—
StatusUnknown
How this service works
Verify a BlindOracle receipt against the parts a buyer cannot check alone: is the proof_id really in BlindOracle's append-only proof rail, does its payload still hash to the stored row, and does the row's HMAC-SHA256 verify against the signing key. Also recomputes content_... | BlindOracle by Craig M. Brown (craigmbrown.com) - counterparty-risk infrastructure sold to autonomous AI agents; self-built multi-agent framework (42+ agents); ERC-8004 agent passport #60979; paid via x402 in USDC on Base
Output
A JSON object containing a verdict enum (PASS, PASS_WITH_GAPS, FAIL, or INCONCLUSIVE), an array of individual check results, a bo_trust object with BlindOracle-specific trust data, a list of seller-side checks performed, and a list of self-checkable checks — giving a complete picture of receipt authenticity.
Example use cases
Buyer verifying seller's delivery proof
“I just received a BlindOracle receipt from the seller claiming they delivered the data. Can you run a full verification — check the proof_id in the proof rail, validate the payload hash, HMAC signature, and Base payment — and tell me if it's a PASS or FAIL?”
Agent-to-agent settlement trust check
“Before my agent releases payment, I need you to verify the BlindOracle receipt the counterparty agent sent. Check the proof rail, hash, HMAC-SHA256 signature, and Base payment confirmation, and give me a verdict.”
Post-transaction receipt audit
“We completed a transaction last week using BlindOracle and I want to audit the receipt we received. Can you verify the proof_id is really in the append-only rail, confirm the content hash hasn't changed, and validate the HMAC signature?”
Technical details
Endpoint
POSThttps://api.craigmbrown.com/v1/services/trust.receipt-verify?utm_source=zero.xyzWhen to prefer
Use this endpoint when you have received a BlindOracle receipt from a counterparty and need a single, authoritative, server-side verification covering the parts a buyer cannot self-check alone — specifically: proof rail membership, HMAC-SHA256 signature validation against the signing key, and Base payment confirmation. Prefer this over the free self-checkable skill (RQ-BO-RECEIPT-VERIFY-01) when you need the seller-side checks that require access to BlindOracle's internal signing key and proof database.
Side effects
- proof_id not found in BlindOracle proof rail — returns FAIL verdict
- payload hash mismatch — content has been tampered with, returns FAIL
- HMAC-SHA256 verification failure — signing key mismatch, returns FAIL
- Base payment not confirmed on-chain — returns FAIL or INCONCLUSIVE
- Malformed or incomplete receipt input — may return INCONCLUSIVE
- BlindOracle proof rail temporarily unavailable — returns INCONCLUSIVE
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| prompt | string |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"properties": {
"checks": {
"type": "array",
"items": {
"type": "object"
}
},
"verdict": {
"enum": [
"PASS",
"PASS_WITH_GAPS",
"FAIL",
"INCONCLUSIVE"
],
"type": "string"
},
"bo_trust": {
"type": "object"
},
"seller_side_checks": {
"type": "array",
"items": {
"type": "string"
}
},
"self_checkable_checks": {
"type": "array",
"items": {
"type": "string"
}
}
}
},
"example": {
"verdict": "PASS"
}
}Tags
x402
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