Check

{
  "checked_at": "2026-09-24T17:00:00Z",
  "ofac_name": null,
  "ofac_wallet": {
    "currency": "ETH",
    "listed": true,
    "program": "CYBER2",
    "sdn_name": "EXAMPLE ENTITY"
  },
  "reasons": [
    "wallet is on the OFAC SDN list (EXAMPLE ENTITY, program CYBER2)"
  ],
  "receipt": {
    "receipt": {
      "checked_at": "2026-09-24T17:00:00Z",
      "service": "KYA Check",
      "verdict": "BLOCK"
    },
    "signature": {
      "alg": "secp256k1-eip191",
      "sig": "0x...",
      "signer": "0x54aB6b8Ddbedc057F230D1b78E6cd4677d304E18"
    }
  },
  "verdict": "BLOCK",
  "wallet_risk": {
    "chain": "base",
    "risk_flags": [
      "sanctioned"
    ],
    "risk_label": "critical",
    "risk_score": 10
  }
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://kya.lonestaroracle.xyz/check?chain=base&name=OFAC&wallet=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://kya.lonestaroracle.xyz/check?chain=base&name=OFAC&wallet=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.1" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fkya.lonestaroracle.xyz%2Fcheck
const res = await pay("https://kya.lonestaroracle.xyz/check?chain=base&name=OFAC&wallet=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.1"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://kya.lonestaroracle.xyz/check?chain=base&name=OFAC&wallet=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913")
    print(res.status_code, res.text)