Google has unveiled the Universal Commerce Protocol (UCP), a new open standard designed to enable AI agents to autonomously discover, purchase, and manage online commerce.
Released under the Apache 2 open-source license, UCP establishes a set of foundational building blocks for what Google describes as “agentic commerce” — covering the full transaction lifecycle from product discovery and purchasing through to post-purchase user experiences.
The protocol is intended to provide a single interoperable standard across the commerce ecosystem, eliminating the need for custom integrations between AI agents, retailers, and payment providers.
Google says UCP will underpin frictionless, instant purchasing experiences across its search platform and its Gemini AI services, fundamentally reshaping how AI-driven product discovery converts into transactions.
Described internally as “core plumbing for agentic commerce,” UCP is designed to serve AI agents, retail platforms, and payment providers alike, creating a shared technical foundation for automated commerce at scale.
Crucially, Google is positioning UCP as a solution to the fragmentation that currently plagues online shopping, promising a system that works without the bespoke integrations that have long slowed innovation across digital commerce platforms.
“UCP establishes a common language for agents and systems to operate together across consumer surfaces, businesses and payment providers,” idhya Srinivasan, VP & GM for ads & commerce at Google, on the company’s technical blog.
“So instead of requiring unique connections for every individual agent, UCP enables all agents to interact easily,” said Srinivasan
“UCP is built to work across verticals and is compatible with existing industry protocols like Agent2Agent (A2A), Agent Payments Protocol (AP2) and Model Context Protocol (MCP),”
UCP was co-developed in collaboration with major commerce platforms and retailers including Shopify, Etsy, Wayfair, Target, and Walmart.
The announcement builds on Google Cloud’s earlier launch of the Agent Payments Protocol (AP2) last year, an initiative aimed at establishing a global standard for secure payments initiated by autonomous AI agents.
As an initial commercial deployment, Google says UCP will soon underpin a new checkout experience for eligible product listings in AI Mode within Search and the Gemini app.
According to Srinivasan, the feature will allow shoppers to complete purchases from participating U.S. retailers directly at the research stage, without leaving Google’s ecosystem.
