Explore the latest Google Pay updates from Google I/O, featuring the new Universal Commerce Protocol (UCP) and MCP server for agentic commerce. Learn how to streamline Android checkouts with dynamic callbacks, expand your reach into social apps via WebViews, and reduce friction with Cross-Device Authentication. Optimize your payment stack with tools for card funding signals, recurring billing continuity, and localized routing.

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Google Pay announced several developer-focused updates at Google I/O 2026. Key highlights include compatibility with the new Universal Commerce Protocol (UCP) for agentic commerce, and a new Google Pay & Wallet Developer MCP server (in Public Preview) that integrates into development environments to help manage integrations and generate code. Android developers gain dynamic callbacks (onPaymentAuthorized, onPaymentDataChanged) for express checkout experiences. Google Pay support is now extended to social apps via WebViews. Additional features include lifecycle notifications for recurring billing tokens, and Cross-Device Authentication that moves desktop MFA friction to a mobile biometric flow to reduce cart abandonment.

The latest updates to Google Pay