# Universal Cart, AP2, Gemini Spark: inside Google I/O 2026

> Every Google I/O 2026 and Marketing Live 2026 announcement that mattered for agentic commerce and AI search, with the keynote video embedded. Universal Cart (cross-merchant agentic shopping cart with Nike, Sephora, Target, Walmart, Wayfair, Ulta, Shopify), UCP expansion to 20+ partners, Marketing Live UCP Tech Council expansion + Stripe-Google partnership, AP2 v0.2.0 donated to FIDO, Gemini Spark, AI Mode + Information Agents on Gemini 3.5 Flash hitting 1B MAUs, Project Mariner folded into Gemini Agent + Chrome auto-browse, Ask YouTube, Custom Generative UI, Agentic Booking expanding into local services.

**Published:** 2026-05-20  
**Category:** Analysis  
**URL:** https://www.tryrankly.com/blogs/google-io-2026-agentic-commerce-ai-search  

## In this article

1. Universal Cart (cross-merchant agentic cart)
2. UCP expansion to 20+ partners and new categories
3. Marketing Live: Tech Council + Stripe-Google partnership
4. AP2 v0.2.0 donated to FIDO Alliance
5. Gemini Spark (24/7 personal agent on AI Ultra)
6. AI Mode + Information Agents (Gemini 3.5 Flash, 1B MAUs)
7. Project Mariner folded into Gemini Agent + Chrome auto-browse
8. AI Mode refresh, Ask YouTube, Custom Generative UI
9. Live Docs, SynthID, Agentic Booking expansion
10. What it means

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Read the full article with all source citations and the keynote video at [https://www.tryrankly.com/blogs/google-io-2026-agentic-commerce-ai-search](https://www.tryrankly.com/blogs/google-io-2026-agentic-commerce-ai-search).

**Keywords:** Google I/O 2026, Marketing Live 2026, Universal Cart, UCP Tech Council, Stripe-Google UCP, AP2, FIDO, Gemini Spark, Information Agents, Project Mariner, Ask YouTube, Custom Generative UI