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ARAKEL Machine Evidence Network - Machine Check
x402
ARAKEL Machine Evidence Network - Machine Check is a paid API for AI agents from proof.arakelproof.space, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Checks an entity against official sources (e.g. OFAC) and returns a cryptographically signed OBSERVED/NOT_OBSERVED/INCONCLUSIVE evidence proof.
Price / call$0.01
Success—
StatusUnknown
How this service works
Machine-verifiable official-source evidence with free preflight and x402 USDC payments on Base.
Output
A JSON object containing a result field (OBSERVED, NOT_OBSERVED, or INCONCLUSIVE), the source that was queried (e.g. OFAC), a schema identifier (arakel.machine-evidence.v2), and a cryptographic Ed25519 signature attesting to the result, suitable for audit and compliance records.
Example use cases
Pre-trade sanctions screening
“Before I send payment to wallet address 0xABCDEF1234567890, check it against OFAC and any other official sources and give me a signed NOT_OBSERVED proof if it's clean.”
Counterparty compliance dossier
“Pull together a full machine-evidence dossier on 'Petrov Exports Ltd' from all enabled official sources so I can decide whether it's safe to onboard them as a supplier.”
Automated KYC preflight check
“Run a quick preflight compliance check on the name 'Hassan Al-Rashidi' against official watchlists — I need to know if there are any hits before I proceed with the account opening.”
Technical details
Endpoint
GEThttps://proof.arakelproof.space/v1/machine/checkWhen to prefer
Choose this endpoint when you need cryptographically signed, machine-verifiable compliance evidence (OBSERVED/NOT_OBSERVED/INCONCLUSIVE) from official sources such as OFAC, rather than a simple name-match lookup. It is particularly valuable when you need a signed proof artifact for audit trails, when you need NOT_OBSERVED proofs (not just positive hits), or when you want to screen counterparties across multiple official sources in one call. The tiered pricing ($0 preflight, $0.005 quick check, $0.01 full check) makes it cost-efficient to run at scale.
Side effects
- Entity identifier not recognized or too ambiguous — returns INCONCLUSIVE
- Queried source temporarily unavailable — may return error or INCONCLUSIVE
- Invalid or missing entity parameter — returns 400-level error
- Payment not provided or insufficient — request rejected before check runs
- Rate limiting on batch checks if quota exceeded
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"result": "OBSERVED|NOT_OBSERVED|INCONCLUSIVE",
"schema": "arakel.machine-evidence.v2",
"source": {
"id": "ofac"
},
"signature": {
"alg": "Ed25519"
}
}
}Tags
x402
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