Google launches Universal Cart with Gemini integration for multi-retailer shopping across Search, Gmail, YouTube

Google announced Universal Cart at I/O 2026, a Gemini-powered shopping tool that consolidates products from multiple retailers into a single interface across Google Search, Gemini, YouTube, and Gmail. The system launches this summer in the US.

Core functionality

Universal Cart allows users to add products from any Google surface to a centralized cart. Gemini operates in the background to:

• Track price changes across retailers
• Identify deals automatically
• Make product recommendations based on cart contents
• Check product compatibility without user prompts

Google demonstrated a PC parts shopping scenario where Gemini identifies incompatibilities between components from different retailers—functionality Google notes is "ironic, given the AI-fueled pricing crisis hitting the gaming market."

The system also accesses Google Wallet data to surface applicable loyalty programs, points balances, and additional savings opportunities at participating retailers.

Retailer integration and checkout

Participating retailers include Walmart, Shopify, Wayfair, Nike, and Target. For these partners, Universal Cart enables one-step checkout through Google Pay across multiple retailers simultaneously. Users can transfer items between merchants within the cart interface.

The underlying Universal Commerce Protocol (UCP) is expanding from the US to Canada and Australia, with UK support planned. UCP checkout will extend to YouTube, hotel bookings, and food delivery.

Rollout timeline

Universal Cart launches first in Search and Gemini in the US "this summer," according to Google. YouTube and Gmail integration will follow at unspecified dates.

Google also announced Agents Payment Protocol (AP2), designed to enable AI agents to "make secure payments on your behalf." AP2 will deploy first to Gemini Spark, Google's 24/7 agent feature also announced at I/O 2026.

What this means

Universal Cart represents Google's bid to control the e-commerce funnel by making its AI assistant the aggregation layer between consumers and retailers. The compatibility checking and automated deal tracking add genuine utility beyond basic cart management. However, the system's success depends on retailer adoption—Google hasn't disclosed how many merchants beyond the named partners will integrate. The simultaneous launch of AP2 suggests Google is positioning for a future where AI agents handle purchasing autonomously, raising questions about user control and spending oversight that Google hasn't addressed.