x402 Payment Integration

x402 is an open HTTP payment protocol by Coinbase. It uses the HTTP 402 status code to enable pay-per-request data access with no accounts or API keys. Verilex accepts payments on all x402-supported chains.

How it works

Using the x402 client

npm install @x402/client

import { x402Client } from "@x402/client";

const client = x402Client({
  privateKey: process.env.WALLET_PRIVATE_KEY,
});

// The client automatically handles 402 → pay → retry
// It picks the best chain from the server's offered options
const response = await client.get(
  "https://api.verilexdata.com/api/v1/npi?state=CA&specialty=Cardiology"
);

console.log(response.data); // NPI provider results

Supported chains

Every paid endpoint accepts payment on any of these chains. Same price on all networks.