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x402 OFAC SDN API – Pre-Payment Screen
x402
x402 OFAC SDN API – Pre-Payment Screen 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).
Performs a directional OFAC SDN check on a payee's wallet address, name, and domain before an x402 micropayment is made, returning a CLEAR or POTENTIAL_MATCH verdict.
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
A JSON object containing: a top-level 'verdict' (CLEAR or POTENTIAL_MATCH), structured 'checks' for host domain age, price sanity, OFAC wallet hits, and fuzzy name match score, a 'reasons' array listing any flags, and a signed 'receipt' with receipt_id, algorithm, SHA-256 hash, and SDN list timestamp. Includes a disclaimer that CLEAR is directional only, not a legal clearance.
Example use cases
Pre-payment sanctions check for x402 agent
“Before my AI agent pays that x402 API, I need you to screen the payee first — wallet address is 0x1234abcd…, the operator name listed is 'Volkov Analytics Ltd', and the endpoint URL is https://volkov-api.vercel.app/query. Is it CLEAR on the OFAC SDN list?”
Crypto wallet OFAC compliance check
“Can you check whether the wallet address bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh is on the OFAC SDN list? The payee goes by 'Rostov Trading Co' — I need to know if there are any potential matches before I authorize the transfer.”
Domain age and name sanity screen before paying
“I'm about to pay a new API I found — the endpoint is https://newapi.xyz/endpoint, the operator name is 'Bright Future Services', and the price is $0.005 USD. Can you run the OFAC and host-age screen on it and tell me the verdict and any flags?”
Technical details
Endpoint
POSThttps://x402-ofac-api.vercel.app/pay-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a lightweight, pay-per-call OFAC SDN pre-flight check before authorizing an x402 micropayment — especially useful for autonomous agents that must perform basic sanctions due diligence without integrating a full compliance platform. Prefer this over manual OFAC lookups when you need a machine-readable verdict with a signed, timestamped receipt. Not a substitute for full AML/KYC or chain analysis.
Side effects
- Missing both wallet and name returns empty/unhelpful result — at least one must be provided
- Fuzzy name match may produce false positives for common names — top_score is returned for human review
- OFAC wallet list in SDN remarks may lag official publications — list_as_of timestamp indicates data freshness
- Does not perform chain analysis or check UK/EU/UN lists — only OFAC SDN
- Domain RDAP lookup may fail for new or obscure TLDs, returning no host age
- Payment via x402 required ($0.003 USDC) — unpaid calls will receive a 402 response
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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