OffBase

app.use(paymentMiddleware({
  "GET /v1/intel/whale-tracker": {
    accepts: {
      scheme: 'exact',
      price: '$0.005',
      network: 'eip155:8453',
      payTo: process.env.OFFBASE_VAULT,
    },
    resource: {
      url: 'https://api.offbase.xyz/v1/intel/whale-tracker',
      serviceName: 'OffBase Intelligence',
      tags: ['political', 'onchain', 'base'],
    },
  },
}, resourceServer));

import { wrapAxiosWithPayment, x402Client } from "@x402/axios";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const client = new x402Client();
client.register("eip155:*", new ExactEvmScheme(account));

const api = wrapAxiosWithPayment(axios.create({
  baseURL: "https://api.offbase.xyz"
}), client);

// Auto-pays 402, retries with USDC on Base
const { data } = await api.get("/v1/intel/whale-tracker");