From answers to agents: what changed in 12 months

By idealbusiness.ai team · Sources checked on 30 October 2026

In a year, AI assistants went from recommending shops to agents that browse, compare and buy for the shopper. Here is what changed, what the new terms mean, and what you, as a shop owner, need to do.

Two stages, one direction

For a while, the main question was whether AI assistants such as ChatGPT, Google's AI Mode, Gemini and Perplexity would mention your shop when someone asked for a recommendation. That still matters, and it is live today.

Over the last twelve months a second stage arrived. AI assistants now show products with current prices, compare them, hold a cart and, in some places, complete the purchase. This is what people mean by "agentic commerce". It is real, but it is early, and most of the checkout part is US-first.

The timeline

• 29 Sep 2025 – ChatGPT adds in-chat buying. OpenAI launched Instant Checkout for US users buying from US Etsy sellers, with Shopify merchants "coming soon", and released the Agentic Commerce Protocol (ACP), co-developed with Stripe. Merchants stay merchant of record and handle orders, payment, fulfilment and support. [1]
• 25 Nov 2025 – Perplexity adds Instant Buy with PayPal. US users can go from research to purchase inside Perplexity; PayPal says the retailer stays merchant of record and is paid directly. [2]
• 11 Jan 2026 – Google announces the Universal Commerce Protocol (UCP). An open standard for agentic commerce, co-developed with Shopify, Etsy, Wayfair, Target and Walmart, and endorsed by more than 20 others. Checkout was announced for eligible US retailers in AI Mode in Search and the Gemini app; retailers remain seller of record. [3]
• 19 Mar 2026 – UCP grows. Google added optional Cart, Catalog (real-time variants, inventory and pricing) and Identity Linking (loyalty benefits) capabilities. [4]
• 24 Mar 2026 – OpenAI shifts focus to discovery. ChatGPT got richer, more visual product browsing and comparisons. Merchants share product feeds and promotions through ACP; Shopify merchants are included through Shopify Catalog with "no additional work" required. OpenAI said the first version of Instant Checkout was too inflexible and is letting merchants use their own checkout. [5]
• 20 May 2026 – Google names next markets. UCP-powered checkout will roll out across Canada and Australia "in the coming months, and later to the U.K." [6]
• Jun 2026 – WebMCP enters testing. Chrome opened a WebMCP origin trial (an opt-in test) in Chrome 149. [8]
• 16 Sep 2026 – Google's holiday update. Google said UCP "already enables direct checkout for hundreds of thousands of brands and retailers across Google"; new UCP integration-hub features roll out in the US first, with Australia and Canada early next year. [10]
• 15 Oct 2026 – Universal Cart launches in the US. A cart that holds items from multiple retailers across Google Search (including AI Mode) and the Gemini app, with checkout powered by UCP. Merchants remain seller of record and handle confirmations and support. [11]

What the new pieces do

Product feeds. A structured list of your products, prices, stock and shipping that you send to a platform. This is how ChatGPT now receives catalogs (via ACP) [5] and how Google Merchant Center has always worked. It is the foundation.

Checkout protocols (ACP and UCP). Agreed rules that let an AI assistant pass an order to your shop and get a confirmation back, without a custom integration for every assistant. ACP comes from OpenAI and Stripe [1]; UCP comes from Google and partners [3]. In every announcement we read, the shop stays the seller. [1][2][3][11]

MCP (Model Context Protocol). A standard way for an AI agent to call a "tool" that a business offers. Shopify's Storefront Catalog MCP, for example, lets agents search one store's catalog, look up products and variants, and find physical store locations. [12]

WebMCP. A proposed web standard that lets a website declare actions that an AI agent in the browser can call directly, instead of guessing which button to click. [7] Chrome calls it "under active discussion and subject to change" and says it is designed mainly for browser tasks "with a human in the loop". [7] It is in origin trials in Chrome 149 and Edge 150, and Brave has added experimental support to its Leo assistant. [9] It is a developer topic for now, not a shop-owner task.

Jargon in one line

• Agentic commerce: AI agents that compare and buy for a shopper, not just recommend.
• Product feed: a structured file of your products, prices and stock that platforms read.
• ACP: OpenAI and Stripe's protocol for sharing feeds and handling orders in ChatGPT.
• UCP: Google-led open protocol for agent checkout, carts and catalog lookups.
• MCP: a standard way for agents to use tools a business exposes.
• WebMCP: a draft browser standard for websites to expose actions to in-browser agents.
• Merchant / seller of record: the business legally selling to the customer, still you.

Where things stand, honestly

Discovery is broad. OpenAI rolled its richer product discovery out to all Free, Go, Plus and Pro ChatGPT users and did not limit the announcement to particular countries. [5] Google says retailers globally can add "conversational attributes" to product data. [6]

Agent checkout is narrow. Every in-assistant checkout launch we checked started in the US. [1][2][3][11] Google has named Canada and Australia next and the UK later [6]; we found no announced date for the EU, Switzerland or Latin America. OpenAI, meanwhile, has stepped back from its own checkout and lets merchants use theirs. [5]

So for shops in Central Europe, DACH, Spain, Ireland or Latin America, the practical priority today is being found and correctly described. Agent checkout is worth understanding, not yet worth a project.

What a shop owner should do

You rarely implement these protocols yourself. Platforms and payment providers do most of that work. OpenAI says Shopify merchants are covered via Shopify Catalog and names Salesforce and Stripe as feed providers [5]; Google names Commerce Inc, Salesforce and Stripe as UCP partners. [4] If you run WooCommerce, Shoptet or PrestaShop, ask your platform, agency or plugin vendor what they support.

Your job is the data the protocols carry:

1. Keep your product feed complete and current. Titles, variants, prices, stock and identifiers. Agents can check live inventory and pricing [4], so gaps show.
2. Mark up product pages with structured data. Product, price, availability, shipping and returns, matching what shoppers see.
3. Publish clear policies. Shipping costs and times, returns, warranty and contact details, on pages that are easy to find and read.
4. Make sure the same facts appear everywhere. Feed, page, markup and policy pages should agree.
5. Watch your platform's announcements for ChatGPT and UCP options in your market.

None of this is wasted if agent checkout arrives late in your country: the same data is what AI assistants use to describe and recommend you today.

Not sure how to prepare, or need help adopting the latest AI practices? Get in touch: hello@idealbusiness.ai

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Sources

1. "Buy it in ChatGPT: Instant Checkout and the Agentic Commerce Protocol", OpenAI, 29 Sep 2025. https://openai.com/index/buy-it-in-chatgpt/
2. "PayPal and Perplexity Launch Instant Buy" (press release), PayPal Newsroom, 25 Nov 2025. https://newsroom.paypal-corp.com/2025-11-PayPal-and-Perplexity-Launch-Instant-Buy
3. "New tech and tools for retailers to succeed in an agentic shopping era", Google (The Keyword), 11 Jan 2026. https://blog.google/products/ads-commerce/agentic-commerce-ai-tools-protocol-retailers-platforms/
4. "Universal Commerce Protocol updates improve AI shopping for retailers", Google (The Keyword), 19 Mar 2026. https://blog.google/products-and-platforms/products/shopping/ucp-updates/
5. "Powering Product Discovery in ChatGPT", OpenAI, 24 Mar 2026. https://openai.com/index/powering-product-discovery-in-chatgpt/
6. "How we're helping retailers thrive with new Universal Commerce Protocol features and AI tools on Google", Google (The Keyword), 20 May 2026. https://blog.google/products-and-platforms/products/shopping/shopping-updates-google-marketing-live/
7. "WebMCP", Chrome for Developers (AI in Chrome docs), published 18 May 2026, updated 7 Oct 2026. https://developer.chrome.com/docs/ai/webmcp
8. "Join the WebMCP origin trial", Chrome for Developers blog, 9 Jun 2026. https://developer.chrome.com/blog/ai-webmcp-origin-trial
9. "WebMCP implementation status", webmachinelearning/webmcp on GitHub, undated (accessed 30 Oct 2026). https://github.com/webmachinelearning/webmcp/blob/main/implementation-status.md
10. "Boost your holiday sales with these agentic commerce updates", Google (The Keyword), 16 Sep 2026. https://blog.google/products-and-platforms/products/shopping/google-shopping-updates-holiday-shopping/
11. Universal Cart launch announcement, Google (The Keyword), 15 Oct 2026. https://blog.google/products-and-platforms/products/shopping/universal-cart-launch/
12. "Storefront Catalog MCP", Shopify Developer docs, undated (accessed 30 Oct 2026). https://shopify.dev/docs/agents/catalog/storefront-mcp