Onesource · Chain Allowance

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://api.onesource.io/api/chain/allowance", {
  method: "GET",
});
const data = await res.json();

curl -X GET \
  "https://api.onesource.io/api/chain/allowance?contract=0xdac17f958d2ee523a2206206994597c13d831ec7&network=ethereum&owner=0xd8da6bf26964af9d7eed9e03e53415d37aa96045&spender=0x6b175474e89094c44da98b954eedeac495271d0f" \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "data": {
    "allowance": "115792089237316195423570985008687907853269984665640564039457584007913129639935",
    "decimals": 6,
    "name": "Tether USD",
    "owner": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
    "spender": "0x6b175474e89094c44da98b954eedeac495271d0f",
    "symbol": "USDT",
    "token": "0xdac17f958d2ee523a2206206994597c13d831ec7"
  },
  "meta": {
    "cost_usdc": "0.001",
    "endpoint": "/api/chain/allowance",
    "payment_chain": "base",
    "payment_token": "USDC",
    "request_id": "00000000abcdef01"
  }
}