At Google's I/O developer conference in May 2026, the company unveiled a major update to its shopping ecosystem: Universal Cart. This AI-powered feature consolidates products from multiple retailers into a single checkout experience, powered by what Google calls the Universal Commerce Protocol (UCP). The goal, according to Google executives, is to make shopping "more fun" by reducing friction between browsing and purchasing.

How Universal Cart works

Universal Cart leverages Gemini, Google's family of large language models, to act as an agentic AI shopping assistant. When a user adds items to their cart from Google Search, YouTube, Gmail, or Gemini itself, the AI works in the background to provide real-time suggestions, compatibility checks, and deal alerts. For instance, if you add a CPU and motherboard that are incompatible, the AI will notify you before you check out. It can also recommend switching to a different credit card to take advantage of discounts, or alert you to a better price from another retailer.

Vidhya Srinivasan, Google's VP of Ads and Commerce, demonstrated these features during the I/O keynote. She showed how a shopper building a PC could seamlessly add parts from different stores, with the AI ensuring everything fits together. The system also integrates with retailer-specific loyalty programs and credit cards, all processed through Google Pay.

The Universal Commerce Protocol

The UCP is an open standard co-developed with major retailers such as Target, Shopify, Wayfair, and Etsy. It allows these retailers to offer their full product catalogs while maintaining control over customer data and loyalty programs. For Google, it represents a way to embed its AI deeper into the shopping journey without forcing retailers to abandon their own infrastructure.

Google has been experimenting with AI-driven shopping for years. In early 2026, the company demoed an "Auto Browse" feature in Chrome, where users could give Gemini permission to navigate websites, find products based on photos, and add them to carts. Universal Cart takes this a step further by unifying the checkout process across retailers, potentially eliminating the need to visit multiple tabs or websites.

Implications for consumers

While Google emphasizes the convenience and fun of automated shopping, the feature also raises concerns about data privacy and consumer agency. The AI tracks your browsing behavior, remembers past purchases, and predicts future needs — for example, it might automatically add toilet paper to your cart every month. Srinivasan described this as the AI handling "digital laundry," or routine tasks that consumers often forget.

Critics argue that automating purchases could lead to overspending or unwanted subscriptions. Google insists that users have full control over what the AI can do, and all actions require explicit permission. Still, the line between helpful suggestion and autonomous action is blurred. The agentic AI is designed to act on your behalf, but only if you grant it the authority. In demos, users can approve or reject AI-driven additions to the cart.

From a broader perspective, Universal Cart positions Google to compete aggressively with Amazon, which dominates the all-in-one shopping experience. By aggregating products from many retailers, Google offers the convenience of a single cart without the inventory management that Amazon requires. However, it also means that Google will collect even more data on consumer behavior, which fuels its advertising business.

Historical context and evolution

Google has long sought to become a shopping destination. In 2002, it launched Froogle (later Google Shopping), which aggregated product listings from across the web. That service evolved into a paid platform in 2012, where retailers pay for placement. Over the years, Google added features like price comparisons, product reviews, and buy buttons. The Universal Cart is the culmination of this journey, combining search, AI, and payments into a unified experience.

The advent of agentic AI — systems that can autonomously carry out tasks — has accelerated these developments. Google's Gemini models are now capable of understanding context, making decisions, and executing actions, such as filling a cart and checking out. Competitors like Amazon are also investing in AI shopping agents, but Google's integration across Gmail, YouTube, and Search gives it a unique advantage in predicting what users want.

Technical details and retailer benefits

For retailers, Universal Cart offers a way to reach customers who are already within Google's ecosystem. Instead of losing shoppers to competitor websites, retailers can present their products alongside others, with the AI suggesting cross-retailer bundles. The UCP ensures that checkout remains integrated with each retailer's backend, handling inventory, pricing, and shipping in real time.

Google also claims that the AI learns individual preferences over time, making recommendations increasingly personalized. For example, if a user frequently buys organic food from a specific store, the AI will prioritize those items in search results. This level of personalization requires extensive data collection, which Google says is anonymized and secured, but regulators have questioned the impact on consumer privacy.

During the I/O keynote, Srinivasan emphasized that the system is designed to be transparent. Users can see why the AI made a suggestion — for instance, "This motherboard is out of stock, but a compatible alternative is available for $20 less." Such transparency may help build trust, but the ultimate decision remains with the user.

Future developments

Looking ahead, Google plans to expand Universal Cart to more retailers and regions. The company also envisions integrating voice commands through Google Assistant and wearable devices like the new Android XR glasses. Eventually, users might simply say, "Plan a birthday party," and the AI will handle every purchase — from decorations to cake and invitations — without manual intervention.

This vision aligns with Google's broader push toward ambient computing, where AI works silently in the background to simplify daily life. However, the success of Universal Cart will depend on whether consumers truly find it "more fun" to let AI spend their money, or whether they prefer to retain control over their shopping decisions. As the technology matures, the line between assistant and agent will continue to blur, reshaping the digital commerce landscape.

Source: ZDNET News