Check Address

Last 30 days

Uptime

100%

Response time

413 ms typical, 1.0 s slowest 5%

Last check

3 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://twin.unykorn.org/check/address" \
  -H "content-type: application/json" \
  -d '{"params":{"chain":"base","value":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}}'

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftwin.unykorn.org%2Fcheck%2Faddress
const res = await pay("https://twin.unykorn.org/check/address", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"params":{"chain":"base","value":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}}),
});
console.log(await res.json());

Example input

{
  "params": {
    "chain": "base",
    "value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  }
}

Example output

{
  "as_of": "2026-10-06T12:30:00Z",
  "cache": {
    "age_s": 0,
    "hit": false,
    "ttl_s": 60
  },
  "check": "address",
  "check_version": "1.0.0",
  "coverage": "full",
  "evidence_sha256": "c1d3b6f0a9e8475d2c6b1a0f9e8d7c6b5a4f3e2d1c0b9a8f7e6d5c4b3a2f1e0d",
  "notice": "Screening signal from public data. Not a legal or compliance determination, not KYC, not advice. Absence from a list is not a clearance.",
  "ok": true,
  "reasons": [
    {
      "code": "CONTRACT",
      "detail": "Bytecode is deployed at this address on Base.",
      "severity": "info",
      "source": "rpc:base"
    }
  ],
  "receipt": {
    "amount_usd": 0.01,
    "receipt_id": "g402-<16hex>",
    "tx_hash": "0x<64hex>"
  },
  "share": {
    "note": "This page shows no payer details. Payments on public chains such as Base are visible on-chain.",
    "url": "https://twin.unykorn.org/check/r/qL3t9Zp0aXvB7nWc2KdR8e"
  },
  "sources": [
    {
      "fetched_at": "2026-10-06T12:00:05Z",
      "id": "ofac_sdn",
      "publisher": "US Treasury OFAC",
      "sha256": "0367408834e4af4d262ccc7e329e300b1a5b1430e1e4bcc4debbdd5b927b4cad",
      "status": "ok",
      "version": "2026-10-02"
    },
    {
      "fetched_at": "2026-10-06T12:00:09Z",
      "id": "eu_fsf",
      "publisher": "European Union (EU consolidated financial sanctions list)",
      "status": "ok",
      "version": "2026-09-22"
    },
    {
      "fetched_at": "2026-10-06T12:00:11Z",
      "id": "uk_sanctions_list",
      "publisher": "UK FCDO (UK Sanctions List)",
      "status": "ok",
      "version": "2026-09-29"
    },
    {
      "fetched_at": "2026-10-06T06:00:00Z",
      "id": "scamsniffer_addresses",
      "publisher": "ScamSniffer (open, 7-day delayed)",
      "status": "ok",
      "version": "5b0e3f1d9a27c64e8f13b2a7d05c9e41f6a8b3c27d1e09f4a6b5c8d7e2f1a0b9"
    },
    {
      "block": 36412290,
      "fetched_at": "2026-10-06T12:30:00Z",
      "id": "rpc:base",
      "publisher": "public RPC (rail provider list)",
      "status": "ok"
    }
  ],
  "subject": {
    "chain": "base",
    "kind": "address",
    "normalized": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "value": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  },
  "subject_salt": "9f2c4e6a8b0d1f3e5a7c9e1b3d5f7a9c",
  "verdict": "pass",
  "verdict_meaning": "Nothing was found in the lists named. A 'no match' means nothing was found in the lists named. It is not a clearance."
}

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