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x402 OFAC SDN Pay-Check API
x402
x402 OFAC SDN Pay-Check API is a paid API for AI agents from x402-ofac-api.vercel.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-12).
Screens a payee's wallet address, name, and domain against the OFAC Specially Designated Nationals list before an x402 micropayment is made
Price / call$0.003
Success—
StatusUnknown
How this service works
Pay-per-call directional OFAC SDN screen for AI agents (USDC on Base + Solana via x402). Potential matches only — not clearance.
Output
Returns a JSON object with a top-level 'verdict' field (CLEAR or POTENTIAL_MATCH), per-check statuses for host age, price sanity, name fuzzy match, and wallet SDN hits, a list of any flagged reasons, and a signed receipt with the OFAC list timestamp and a unique receipt ID. Includes a prominent disclaimer that CLEAR is not a legal clearance or certification.
Example use cases
Pre-payment wallet sanctions check
“I'm about to send a USDC micropayment to wallet 0xDeAdBeEf... via x402 — can you run an OFAC SDN check on that address and the payee name 'Nova Commerce Ltd' before I proceed?”
AI agent autonomous payment guard
“My agent is processing an x402 payment challenge from https://data-vendor.io — screen the payment_required object and the payee wallet for OFAC sanctions hits before my agent pays.”
Fuzzy name screening for onboarding
“We're onboarding a new API vendor called 'Rashid Al-Farouq Consulting' — can you fuzzy-match that name against the OFAC SDN list and tell me the top match score?”
Technical details
Endpoint
POSThttps://x402-ofac-api.vercel.app/api/v1/pay-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or automated payment flow needs a fast, pay-per-call pre-payment OFAC SDN screen specifically designed for the x402 micropayment protocol — particularly when you have a wallet address, a payee name, and/or a domain to screen together in one call. Prefer it over generic sanctions APIs when you are already handling x402 payment_required objects and want native parsing of those headers. Not a substitute for full AML compliance, chain analysis, or EU/UK/UN list screening.
Side effects
- Payment not received or invalid x402 payment header — returns 402 Payment Required
- Wallet address format unrecognized — check may return error or skip wallet sub-check
- OFAC list unavailable or stale — receipt will reflect list timestamp, potential delay
- Name field empty — name_match check skipped, status returned as 'skipped'
- Domain too new or RDAP lookup failure — host age check may return error status
- More than 10 wallets submitted — excess wallets silently ignored or error returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Endpoint URL being paid (for host age) |
| name | string | Optional payee/operator legal name for SDN fuzzy match |
| wallet | string | Payee wallet to check against OFAC SDN crypto addresses |
| wallets | array | Up to 10 extra wallets |
| price_usd | number | Optional price in USD if not in payment_required |
| mpp_request | object | Decoded MPP challenge request object (recipient/amount/resource) |
| check_host_age | boolean | RDAP domain age lookup (default true) |
| payment_required | object | x402 PAYMENT-REQUIRED body/header (object, JSON string, or base64). payTo, amount, asset, resource are read from it. |
| www_authenticate | string | MPP WWW-Authenticate Payment challenge header value (method="tempo"|"stripe", request=<base64url>) |
Output
Schema · Response
{
"type": "json",
"example": {
"checks": {
"host": {
"status": "ok",
"age_days": 3650
},
"price": {
"status": "ok",
"max_usd": 0.01,
"trap_threshold_usd": 1000
},
"name_match": {
"status": "no_match",
"top_score": 0
},
"ofac_wallet": {
"hits": [],
"status": "no_match"
}
},
"reasons": [],
"receipt": {
"alg": "Ed25519",
"sha256": "…",
"signed": true,
"list_as_of": "2026-10-10T04:18:02.953473+00:00",
"receipt_id": "pc_…"
},
"verdict": "CLEAR",
"disclaimer": "Directional pre-payment check only. CLEAR means none of these checks raised a flag; it is not a clearance, certification, or attestation, and not legal or compliance advice. OFAC SDN only (wallets listed in SDN remarks + name fuzzy match) — no chain analysis, no UK/EU/UN lists. Verify against official OFAC publications.",
"potential_matches_only": true
}
}Tags
x402
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