Google Launches UCP for Agentic Commerce

Overview

Google has announced the Universal Commerce Protocol (UCP), a new open standard designed to make agentic commerce work across the full shopping journey, from discovery to checkout and post purchase support. The goal is straightforward: give AI agents and commerce systems a shared language so retailers do not need to build custom integrations for every new agent or platform.

The announcement also includes product updates aimed at retailer visibility and conversion on Google surfaces like AI Mode in Search and the Gemini app: a branded chat experience called Business Agent, new Merchant Center data attributes for conversational discovery, and a Google Ads pilot called Direct Offers.

This move also lands in a fast forming competitive landscape. For example, Microsoft's recent launch of agentic AI retail tools like Copilot Checkout shows how major platforms are simultaneously pushing toward AI driven shopping flows, even if their approaches to interoperability differ.

What is agentic commerce, in practical terms

Agentic commerce is a shift from search and browse to delegated action. Instead of a shopper only gathering information, an AI agent can complete tasks on the shopper’s behalf, such as comparing products, applying discounts, checking out, and handling follow ups.

For builders, the key change is that commerce flows become API first and conversation native. The agent needs reliable, structured interfaces for product data, policy constraints, identity, and payments.

Universal Commerce Protocol (UCP): the interoperability layer

UCP is Google’s attempt to standardize how agents, retailers, and payment providers coordinate across the shopping lifecycle.

Key features

• Open standard across the journey: supports discovery, buying, and post purchase support.
• Common language for agents and systems: reduces one off integrations for each agent.
• Cross vertical by design: intended to work beyond a single retail category.
• Compatible with existing protocols: designed to align with Agent2Agent (A2A), Agent Payments Protocol (AP2), and Model Context Protocol (MCP).

Ecosystem support

Google says UCP was co developed with Shopify, Etsy, Wayfair, Target, and Walmart, and endorsed by more than 20 additional companies across payments and retail, including Adyen, American Express, Mastercard, Stripe, Visa, and others.

In parallel, Google has already been building momentum through enterprise rollouts, including partnerships with retailers like Home Depot to deploy Gemini-powered agentic tools, which helps explain why the company is now pushing a more standardized protocol layer.

Early product rollout

UCP will soon power a new checkout experience on eligible Google product listings in AI Mode in Search and in the Gemini app. Key implementation details:

• Retailers remain seller of record.
• Checkout uses Google Pay with payment and shipping info saved in Google Wallet.
• PayPal support is planned.
• The initial rollout targets eligible U.S. retailers, with global expansion planned.
• Google also mentions future capabilities such as loyalty rewards, related product discovery, and custom shopping experiences.

Business Agent: branded chat on Search

Google is also launching Business Agent, which lets shoppers chat directly with a brand in Search, positioned as a virtual sales associate that answers product questions in a brand’s voice.

Business Agent begins rolling out with retailers including Lowe’s, Michael’s, Poshmark, and Reebok. Eligible U.S. retailers can activate and customize it via Merchant Center. Google says later phases may allow:

• training the agent using retailer data
• new customer insights
• related product offers
• direct purchases, including agentic checkout

Merchant Center updates for conversational discovery

To help products surface in conversational interfaces, Google is adding dozens of new Merchant Center data attributes. These go beyond classic keyword fields and can include:

• answers to common product questions
• compatible accessories
• substitutes and alternatives

This starts with a small cohort of retailers, with broader availability expected over the coming months.

Direct Offers in Google Ads

Direct Offers is a new pilot in Google Ads for AI Mode. It lets advertisers show exclusive discounts directly where high intent shoppers are evaluating options. Retailers configure offers in campaign settings, and Google uses AI to decide when an offer is relevant.

The pilot starts with discounts and is expected to expand to value signals like bundles and free shipping.

Impact for developers and founders

For teams building retail platforms, agents, or checkout infrastructure, Google’s announcement points to three practical shifts:

• Standardization pressure: adopting UCP compatible interfaces could reduce integration cost across multiple agents and surfaces.
• Feed and schema as growth levers: Merchant Center attributes become part of conversational ranking and retrieval.
• Conversion moves earlier in the funnel: if checkout can happen during research, instrumentation, attribution, and fraud controls need to work in AI mediated flows.

What to watch next

Near term, the most important signals will be how quickly UCP moves from announcement to widely implemented spec, and how Google opens up tooling for testing, certification, and compatibility across non Google agents. Global rollout timelines, PayPal availability, and the scope of post purchase support integrations will also shape adoption for retailers and platforms.

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Source: Google: Agentic commerce and new AI tools for retailers and platforms