Learn and implement the x402 payment protocol for monetizing APIs on Algorand.
This repository focuses on API monetization — one powerful use case of x402. Build protected APIs that charge per request using blockchain-verified payments. No payment processor setup needed.
x402 version: 2.11.0
Network: Algorand TestNet
New to x402? Start with x402-basic-tutorial/ — a step-by-step walkthrough following the Algorand Developer Portal tutorial. You'll build both client and server code.
Want to see patterns? Browse x402-examples/ — five client implementations (fetch, axios, custom, advanced, MCP) plus reference servers.
Prerequisites: Algorand TestNet account with ALGO and USDC.
- x402 Protocol — Specification and design
- @x402 on npm — Client and server libraries
The x402 protocol transforms any API into a paid service without changing your code. Payments are transparent, trustless, and verified on-chain.