Known-address label lookup · Address Label

import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://agent402.tools/api/address-label", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  }),
});
const data = await res.json();

curl -X POST \
  "https://agent402.tools/api/address-label" \
  -H "Content-Type: application/json" \
  -d '{"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "address": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
  "found": true,
  "labels": [
    {
      "category": "token",
      "label": "USDC",
      "network": "base",
      "note": "Circle USD Coin (native)"
    }
  ],
  "provenance": {
    "entries": 34,
    "source": "curated in-repo dataset",
    "updated": "2026-07-13"
  }
}