thirdweb

thirdweb provides blockchain-based payment infrastructure that lets developers add pay-per-call crypto payments to their APIs and services. It enables you to monetize endpoints by requiring small payments for each API call, eliminating the need for traditional subscription models or API keys. The system handles payment authentication automatically, so users can access your service by simply paying per use.

The platform uses the x402 protocol, which is fully interoperable with standard API specifications. It supports thousands of different tokens across multiple blockchain networks, giving both developers and users flexibility in payment options. Transactions are processed through server wallets and a Rust-based execution engine, designed for speed and security. This setup allows for automatic payment retries and built-in auto-pay functionality.

This tool is particularly useful for developers building API marketplaces, metered data services, or any application where pay-per-use pricing makes sense. It also enables AI agents to autonomously purchase services, opening up possibilities for machine-to-machine commerce. Businesses can use it to offer free basic features while charging for premium actions directly at the point of use.