By SanctionsAI team · Updated 2026-08-09

Check OFAC sanctions in JavaScript

Screen crypto wallets against OFAC SDN list using JavaScript.

Node.js with fetch

async function checkSanctions(wallet) {
    const resp = await fetch(
        `https://sanctionsai.dev/sanctions?wallet=${wallet}`
    );
    const data = await resp.json();
    return data;
}

const result = await checkSanctions("0x098B...");
if (result.blocked) console.log("BLOCKED!", result.matches);

Browser-side screening

async function screenPayment(wallet) {
    try {
        const resp = await fetch(
            `https://sanctionsai.dev/sanctions?wallet=${wallet}`
        );
        const data = await resp.json();
        if (data.blocked) {
            alert("Wallet is OFAC-designated. Payment blocked.");
            return false;
        }
        return true;
    } catch (e) {
        return false; // Fail safe
    }
}

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