How to build a x402 App скачать в хорошем качестве

How to build a x402 App

Build an API That Charges Per Request with x402 — Crypto Payments Over HTTP In this step-by-step tutorial, you'll build a complete API that accepts crypto micropayments using the x402 protocol — no API keys, no subscriptions, no sign-up forms. Using Express.js, TypeScript, and USDC on Base Sepolia, you'll create a joke API that costs one tenth of a cent per request, a browser frontend with MetaMask wallet integration, and a headless client script perfect for bots and AI agents. We'll also expose the server to the internet with ngrok so any machine can discover and pay for your API automatically. Contact: ben@dwellir.com GITHUB: https://github.com/dwellir-public/x40... RESOURCES: x402 Protocol: https://www.x402.org/ Base Sepolia Testnet: https://docs.base.org/network-informa... Circle USDC Faucet: https://faucet.circle.com/ MetaMask: https://metamask.io/ ngrok: https://ngrok.com/ Vite: https://vite.dev/ Express.js: https://expressjs.com/ viem: https://viem.sh/ WHAT YOU'LL LEARN: 00:00 - Intro & what x402 is 01:28 - Demo 01:57 - Project overview (5 files) 06:11 - Networking overview 07:56 - Agent payments USE CASES: Pay-per-request APIs with zero sign-up friction AI agent-to-API payments without API keys or subscriptions Micropayment-gated content and data endpoints Bot and cron job automation with headless crypto payments Machine-to-machine commerce over standard HTTP Monetizing open APIs without traditional billing infrastructure Prototyping Web3-native SaaS pricing models on testnet