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x402 Protocol Launches on the Arbitrum Network to Enable AI-Powered Microtransactions

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On May 14, 2026, Arbitrum announced a protocol update with the launch of x402, a Coinbase-backed project. The protocol enables AI agents to pay for APIs, services, and software using stablecoins. Named after HTTP 402, x402 supports instant micro-payments via blockchain and traditional payment channels. Managed by the x402 Foundation, the protocol is backed by over 20 companies, including Cloudflare, Stripe, and Visa. This on-chain development represents a key advancement in decentralized payment infrastructure.

BlockBeats report, on May 14, Arbitrum officially announced that Coinbase’s x402 protocol is now live on the Arbitrum network, enabling developers to allow AI agents to directly pay for APIs, services, and software using stablecoins.


The x402 protocol is named after the unused HTTP 402 "Payment Required" status code, enabling websites, APIs, and AI bots to request and receive instant micropayments via blockchain and traditional payment channels. The protocol is managed as an open standard by the x402 Foundation under the Linux Foundation and is supported by more than 20 organizations and crypto companies, including Cloudflare, Stripe, AWS, Google, Visa, Base, Circle, and the Solana Foundation.

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