Google turns Gemini into a cross-web personal shopper

Online shopping usually involves opening a dozen browser tabs across different sites, mentally calculating card reward points, double-checking product specs, and repeatedly typing in shipping addresses.

At Google I/O 2026, Google introduced a direct fix for this fragmentation: Universal Cart. Powered by Gemini models and hooked into Google’s 60-billion-item Shopping Graph, the new feature wants to act as a unified shopping hub across the entire internet.

A proactive cart that checks your PC build

Universal Cart works directly inside the Google services people already use daily. You can drop products into the cart while searching on the web, chatting with Gemini, watching a YouTube video, or reading an email in Gmail.

Once products are in the cart, Gemini runs in the background. It continuously tracks price histories, monitors sudden price drops, surfaces hidden deals, and pings you when out-of-stock items return to store shelves.

It also handles compatibility reasoning. If you are building a custom PC and add components from several different retailers into your cart, Gemini will spot incompatibilities—like a processor that does not match your chosen motherboard—and proactively suggest working alternatives.

Because the cart integrates with Google Wallet, it understands your credit card perks, merchant coupons, and loyalty points. It automatically recommends payment methods that maximize points or trigger hidden cash-back perks.

For purchases, Google’s Universal Commerce Protocol (UCP) allows a quick checkout via Google Pay, or lets you transfer the entire basket to the retailer site to finish up. In either case, the brand remains the merchant of record. Initial retail partners include Nike, Sephora, Target, Ulta Beauty, Walmart, Wayfair, and Shopify brands like Fenty and Steve Madden.

Universal Cart is rolling out across Google Search and the Gemini app in the U.S. this summer, with YouTube and Gmail following later. Google is also taking UCP to Canada, Australia, and eventually the UK, while expanding into hotel bookings and food delivery.

Guardrails for AI agent spending

To prepare for autonomous shopping agents, Google also detailed its Agent Payments Protocol (AP2). The protocol lets software agents purchase items on your behalf without handing them unchecked access to your wallet.

Users can set precise guardrails, such as specifying exact brands, approved product models, and strict budget ceilings. The agent only executes the checkout when every constraint is met.

Under the hood, AP2 uses tamper-proof digital mandates to connect the consumer, merchant, and payment processor. This creates an unchangeable audit trail that both sides can refer to if a return or dispute arises. Google plans to bring AP2 to its own products in the coming months, beginning with the newly announced Gemini Spark assistant.

Why it matters

For shoppers, this is an immediate quality-of-life win. Managing multi-store research—like outfitting a home gym or sourcing PC parts—has historically required personal spreadsheets. Letting Gemini handle compatibility checks, price tracking, and credit card optimization saves real time. If you shop regularly across U.S. retailers, it is definitely worth trying as soon as it arrives in Search this summer.

For the broader tech landscape, Google is aggressively defending its most lucrative territory. As standalone AI chatbots threaten to bypass traditional search entirely, Google is showing that it can do something conversational bots struggle with: closing the loop across discovery, inventory, and payment. By weaving Search, YouTube, and Gmail into a frictionless checkout funnel, it raises the switching cost for users considering alternative AI platforms.

In our view, Google handled merchant relations intelligently here. By keeping brands as the merchant of record rather than trying to become an Amazon-style intermediary, it managed to win over major retailers like Walmart and Target.

However, there is an obvious tension ahead. Universal Cart effectively gives Google visibility across the entire consumer journey from intent to purchase. We think retailers and antitrust regulators will closely monitor just how much market power Google amasses as it positions itself as the default gatekeeper of online commerce.