Google, Visa, Stripe and Others Race to Build Payment Infrastructure for AI Agents

In the first half of 2026, major players including Google, Mastercard, Visa, Stripe, American Express, Ant International, and Circle have all launched or announced infrastructure designed to let AI agents make payments autonomously on behalf of users. The push reflects a convergence of capable large language model agents, legacy payment rails ill-equipped for machine-initiated transactions, and intense competition among tech and finance firms to own the emerging agentic payments layer. Several competing protocols are now available to developers, including Google's Agent Payments Protocol (AP2), Coinbase's x402, Stripe and Tempo's Machine Payments Protocol, Visa's Trusted Agent Protocol, and Circle's Agent Stack, all of which launched or expanded within months of each other. No single standard has emerged as dominant yet, but the tools have moved beyond whitepapers into installable SDKs that developers can use today. Key challenges remain around authorization, identity verification, and spending controls, as existing infrastructure like card networks and PCI DSS was designed with a human present at the point of transaction.