Google Built a Shopping Protocol for AI Agents. 75 Million People Are Already Inside It.

Google has 75 million people using AI Mode every day. Now it's letting AI agents buy things for them. On February 11, Google launched shopping ads inside AI Mode — its conversational search interface where users ask questions in natural language and get synthesized answers instead of links. But the ads are the least interesting part. The interesting part is what's underneath them: a Universal Commerce Protocol that lets AI agents discover products, compare prices, negotiate checkout, and complete transactions across retailers without any custom integration. Shopify, Target, Walmart, Etsy, Wayfair, Best Buy, Macy's, Home Depot, Visa, Mastercard, Stripe, American Express, and Adyen are already on board. More than 20 partners total. This is not an ad product. This is infrastructure for the post-search economy. The Protocol UCP launched January 11. Google built it in collaboration with Shopify, which simultaneously released its own "Agentic Storefronts" — a single admin panel where merchan