x402 on Polygon

x402 is an open payment protocol that brings blockchain payments into a familiar web standard. By re-using the HTTP 402 Payment Required status code, it lets developers handle on-chain and agentic payments with the same tools they already use for APIs and web services.

Instead of building complex wallet integrations or subscription systems, developers can simply treat payments like another part of the HTTP request/response cycle. This lowers the barrier for web2 developers experimenting with crypto, while also giving web3 builders a lightweight way to support pay-per-use APIs, agent-to-agent transactions, and micropayments.

Read more about the x402 architecture and concepts here.

Access on Polygon

Polygon currently supports x402 on Mainnet and Amoy through the following facilitators:

1. x402.rs Facilitator Endpoint
2. ThirdWeb
3. Polygon Testnet Facilitator: https://x402-amoy.polygon.technology

Please note: For mainnet access through Polygon’s Facilitator, reach out for access here.

The following guides will show how to use x402 on Polygon. The x402 community also has created multiple examples which can be easily adapted for Polygon.