By SanctionsAI team · Updated 2026-08-09

Pre-check smart contract calls for sanctions

Add a sanctions screening layer to smart contracts using an oracle.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

interface ISanctionsOracle {
    function isBlocked(address wallet) external view returns (bool);
}

contract SanctionsGuard {
    ISanctionsOracle public oracle;
    
    modifier notSanctioned(address addr) {
        require(!oracle.isBlocked(addr), "Sanctioned address");
        _;
    }
}
Note: Oracle-based screening adds gas costs. Use for high-value transactions. For all transactions, use off-chain (front-end) screening via API.

Screen your agent's next payment

Check any wallet, name, or entity against OFAC, EU, UN sanctions lists in real time.

Free wallet checker

Frequently Asked Questions

Is the SanctionsAI API free?
Yes. Free tier: 5 checks/day by IP, no API key. Dev: $19/mo for 10,000 checks. Team: $99/mo for 100,000.
How fast is the API?
Sub-200ms for wallet and name checks. Suitable for real-time payment flows.
Can I use this in production?
Yes. Production-grade with 99.9% uptime. Use Dev or Team plan for production volume.
What happens if the API is down?
Fail safe: block the transaction and log the error. Never proceed without a clean screening result.

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