Visa, Mastercard Adopt x402 for AI Agent Payments

Visa, Mastercard, and Coinbase have agreed on a shared rulebook for how machines will pay each other. The x402 Foundation, an open standards body, operationally launched on July 14, 2026. Its purpose is to allow AI agents and software to pay for goods and services directly over the internet. What's interesting is that the protocol, x402, was built by Coinbase and given to the Linux Foundation. Forty companies joined as founding members, including Visa, Mastercard, and Google. Seventeen of these, like American Express and Amazon Web Services, are premier members with a direct role in governance. The x402 system reuses an old HTTP status code. When a server returns "402 Payment Required," it now provides instructions for a machine to complete a payment on the spot. This could be with a stablecoin or through a card network. The platform has already processed about 75 million transactions in the 30 days before its launch, moving $24 million between 94,000 buyers and 22,000 sellers. The average payment was about 32 cents. This system addresses the need for machines to make tiny, frequent payments, which traditional finance isn't designed for. This matters because it signals a major shift in how automated systems will conduct transactions in the future.