The x402 protocol is now live on the Arbitrum network

Arbitrum official announcement, the x402 protocol under Coinbase is now live on the Arbitrum network, allowing developers to enable AI agents to directly use stablecoins to pay for APIs, services, and software fees. The x402 protocol is named after the unused HTTP 402 "Payment Required" status code, which allows websites, APIs, and AI bots to request and receive instant micropayments through blockchain and traditional payment channels.

The protocol is managed as an open standard by the x402 Foundation under the Linux Foundation and has the support of over 20 institutions and crypto companies, including Cloudflare, Stripe, AWS, Google, Visa, Base, Circle, and the Solana Foundation.