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ChainWard API: OFAC Sanctions Screen for EVM Address
x402
ChainWard API: OFAC Sanctions Screen for EVM Address is a paid API for AI agents from api.chainward.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).
Checks whether a Base or BNB Chain EVM address appears on the US Treasury OFAC SDN digital currency sanctions list, returning a sanctioned/not-listed verdict for $0.01 USDC per call.
Price / call$0.01
Success—
StatusUnknown
How this service works
Before your agent pays a Base or BNB Chain address: a verdict (pay / hold / unknown, shown as Pay, Hold, Inactive, No track record or Couldn't check) with the one reason ($0.05). For a seller: real or self-funded demand ($0.10). For a BNB Chain agent: hired by others or by its own circle ($0.10). Before every payment: an OFAC sanctions screen ($0.01). Evidence and limits under every verdict. Paid in USDC on Base over x402; a check that fails is never charged.
Output
Returns a JSON object with a success flag and a data payload containing: the verdict object (text like 'Not listed', label like 'not_listed', and reason string), a boolean 'sanctioned' field, the queried address, metadata about the OFAC SDN list snapshot (name, source URL, address count, fetch date), a caveat/limit note clarifying that not-listed is not a clearance, and a URL to the full counterparty check for deeper analysis.
Example use cases
Pre-payment sanctions check for agent
“Before my agent sends payment to 0xAbc123...def456 on Base, run an OFAC sanctions screen on that address so we stay compliant.”
Compliance gate for DeFi protocol
“Our protocol needs to block sanctioned wallets — can you check if 0x1234567890abcdef1234567890abcdef12345678 appears on the OFAC SDN digital currency list?”
Vendor wallet compliance verification
“We're onboarding a new vendor who gave us their Base wallet 0xdeadbeefdeadbeefdeadbeefdeadbeefdeadbeef — can you verify it's not sanctioned by OFAC before we add it to our payment system?”
Technical details
Endpoint
GEThttps://api.chainward.ai/api/risk/ofac?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, cheap ($0.01) OFAC-specific sanctions screen on a single EVM address before executing a payment on Base or BNB Chain. Prefer it over the full counterparty check when regulatory compliance (not behavioral risk) is the primary concern, or when cost per call matters at scale. It is the right first gate in a compliance pipeline — if the address passes, optionally escalate to the $0.05 full counterparty check for behavioral signals.
Side effects
- Invalid address format (not a 40-hex-char 0x address) returns a validation error without charge
- Address not found in OFAC list returns not_listed verdict (not an error)
- Stale snapshot: addresses added after the snapshot date are not covered
- Network or upstream failure may return an error; failed checks are not charged
- OFAC list only covers published EVM addresses — wallets associated with sanctioned parties but not directly listed are not detected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"list": {
"name": "US Treasury OFAC SDN list, digital currency addresses (EVM)",
"source": "https://github.com/0xB10C/ofac-sanctioned-digital-currency-addresses",
"addresses": 124,
"fetched_at": "2026-10-11"
},
"limit": "Not listed is not a clearance: wallets that belong to or deal with a listed party, and addresses added after the snapshot date, are not covered. For behavior (activity, counterparties, flags) use the counterparty check.",
"address": "0x4baadba26c3c0bdef9e8faf173925d463aa53bb2",
"verdict": {
"text": "Not listed",
"label": "not_listed",
"reason": "This exact address is not among the 124 EVM addresses OFAC has published."
},
"full_check": "https://api.chainward.ai/api/risk/x402?address=0x4baadba26c3c0bdef9e8faf173925d463aa53bb2",
"sanctioned": false
},
"success": true
}
}Tags
x402
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