---
title: "x402 Config Generator"
description: "Generate ready-to-use x402 payment middleware code for Express, Hono, Next.js, Fastify, Gin, FastAPI, and Flask. Configure routes, pricing, networks, and get copy-paste code for servers and clients."
url: https://findutils.com/developers/x402-config-generator/
category: developers
---

# x402 Config Generator

Generate ready-to-use x402 payment middleware code for Express, Hono, Next.js, Fastify, Gin, FastAPI, and Flask. Configure routes, pricing, networks, and get copy-paste code for servers and clients.

**Use this tool:** [x402 Config Generator](https://findutils.com/developers/x402-config-generator/)

## Programmatic access

- REST id `x402-config-generator`: POST https://api.findutils.com/api/tools/x402-config-generator/execute (reference: https://findutils.com/api/x402-config-generator/)
- MCP tool `x402_config_generator` on https://mcp.findutils.com (reference: https://findutils.com/mcp/x402-config-generator/)

## Why Use x402 Config Generator?

x402 is an open payment standard that enables services to charge for API access directly over HTTP using the 402 Payment Required status code. Setting up x402 requires configuring middleware, payment routes, network identifiers, and wallet addresses across different frameworks and languages. This generator eliminates boilerplate by producing production-ready code for 7 server frameworks (Express, Hono, Next.js, Fastify, Gin, FastAPI, Flask) and 5 client SDKs (Fetch, Axios, Go, Python httpx/requests). Configure your routes, pricing, and networks visually, then copy the generated code directly into your project. Whether you are building paid APIs, micropayment-based services, or enabling AI agent-to-agent payments, this tool gets you from zero to working x402 integration in seconds.

## Frequently Asked Questions

### What is x402?

x402 is an open-source payment protocol by Coinbase that activates the HTTP 402 Payment Required status code for programmatic, on-chain payments. It supports stablecoins like USDC across multiple blockchains including Base, Polygon, Solana, Aptos, and Stellar.

### What frameworks does x402 support?

x402 has official SDKs for TypeScript (Express, Hono, Next.js, Fastify), Go (Gin, net/http), and Python (FastAPI, Flask). Client SDKs are available for fetch, axios, Go net/http, and Python httpx/requests.

### What is a facilitator in x402?

A facilitator is a service that verifies and settles payments on behalf of your server. It handles blockchain complexity so your server does not need direct blockchain connectivity. The default testnet facilitator is at x402.org/facilitator.

### What networks and tokens does x402 support?

x402 supports EVM chains (Base, Polygon, Avalanche, Sei) with any ERC-20 token via EIP-3009 or Permit2, Solana with SPL tokens, Aptos with fungible assets, and Stellar with Soroban tokens. USDC is the default payment token.

### Does x402 cost anything, or need an account with the protocol?

Yes, x402 is open-source under the Apache 2.0 license with zero protocol fees. The Coinbase CDP facilitator offers 1,000 transactions per month, then $0.001 per transaction after that.

### Does the x402 Config Generator require a signup?

No. It is available with no signup and no usage limits. The code is generated in your browser from the options you choose.

### What does the generator produce?

An install command and copy-paste middleware or client code for the framework you pick, with your routes, prices, network, and any extensions filled in. Choose your role first, then the framework or SDK.

### Can I generate both the server and the client side?

Yes. The first step asks for your role. Pick server to get the payment middleware for Express, Hono, Next.js, Fastify, Gin, FastAPI, or Flask, and pick client to get the paying-side code.