Google introduced its Agent Payments Protocol (AP2), an open framework that allows AI applications to initiate and complete payments across platforms, including support for stablecoins.
Google Launches Agent Payments Protocol with Stablecoin Support
17 September 2025 - 09:39 CEST
Developed with more than 60 partners including Coinbase, Mastercard, American Express and Salesforce, the system is designed to improve security, interoperability and accountability in transactions initiated by AI agents.
AP2 builds on Google’s earlier Agent2Agent model, introducing cryptographically signed digital “mandates” to confirm user intent and authorisation. These contracts provide merchants and payment providers with verifiable assurance that a transaction reflects genuine approval.
Digital assets and x402
To support digital-asset settlement, Google introduced x402, an extension developed with the Ethereum Foundation, Coinbase and MetaMask. It enables agent-based payments using stablecoins such as USDC, alongside bank transfers and card networks.
Industry reaction
The protocol has backing from major financial firms. Mastercard’s Pablo Fourez said AP2 ensures “trust and safety remain at the core of every transaction.” Others noted the framework could help avoid fragmentation in AI-driven commerce by setting shared standards.
Stablecoin growth
The launch comes as stablecoins continue to expand. According to DeFiLlama, circulating supply has climbed to $290 billion, up from $205 billion at the start of the year.
Circle, the issuer of USDC, underscored the trend with its upsized IPO earlier this year, which drew strong investor demand.
What’s next
Google said AP2 will be released as an open specification, but widespread consumer-facing adoption has yet to be confirmed. Questions remain over regulatory treatment, integration and how disputes will be managed. Even so, AP2 could set an early benchmark for AI-driven payments if uptake accelerates.
