Guides · Ads & shopping in AI

What is agentic commerce? A practical guide for online stores.

In short: agentic commerce means AI agents search, compare and buy products on someone’s behalf, in ChatGPT, Google’s AI Mode, Copilot or Perplexity. Stores and agents talk through open protocols such as UCP (Google, Shopify and others) and ACP (OpenAI and Stripe), and payments run through schemes like AP2, Visa Intelligent Commerce or Mastercard Agent Pay. In the U.S., most of it is live: Shopify turns on agentic storefronts by default for eligible stores. What every store controls is clean product data, readable pages and content agents can cite.

By the Claire teamLast checked 8 min read

At a glance

As of October 8, 2026

Shopify’s agentic storefronts are on by default for eligible stores; ChatGPT and Copilot require selling to U.S. customers.

Source: Shopify Help: Agentic storefronts

Google says UCP already enables direct checkout for hundreds of thousands of brands and retailers (Sep 2026).

Source: Google: Agentic commerce updates, Sep 16, 2026

Adobe: traffic from generative AI tools to U.S. retail sites rose 693.4% in the 2025 holiday season, from a modest base.

Source: Adobe: 2025 holiday season, Jan 7, 2026

Shopify: AI-referred orders grew nearly 13x year over year in Q1 2026; organic search still drives more sessions.

Source: Shopify Enterprise blog: AI-referred shoppers (Q1 2026 data)

Contents

Basics

What is agentic commerce? Shopping that an AI agent does for you.

Google describes AI agents as autonomous systems that perform tasks on behalf of people, such as booking a reservation or comparing product specifications. Agentic commerce applies that to shopping: the agent searches, compares, builds the cart and prepares the purchase. For payment, the protocols require the buyer’s approval, in AP2 for example as a mandate.

01

Three stages worth separating

Many articles lump them together. For your store they mean different things.

Discover

What the agent does
search, compare, recommend products
Example
product cards and shopping research in ChatGPT

Prepare

What the agent does
build the cart, trigger the purchase on the merchant site
Example
Google’s agentic checkout buys on the merchant’s website

Buy

What the agent does
complete payment in the chat, after approval
Example
Copilot Checkout, Perplexity Instant Buy, Google’s UCP-powered checkout

Sources:Google Search Central: Optimizing for generative AI features (updated Jul 10, 2026)Google Merchant Center Help: UCP-powered checkoutMicrosoft Advertising: Copilot Checkout, Jan 8, 2026Perplexity Help: Instant Buy (Sep 14, 2026)

02

A real example: a Shopify store’s agent instructions

allbirds.com serves instructions for agents at /llms.txt. They explain how to search products, create a cart and prepare checkout, point to a dedicated Universal Commerce Protocol endpoint, and state that payment requires the buyer’s explicit approval. That’s what agentic commerce looks like from a store’s side today.

Sources:allbirds.com/llms.txt (Shopify store)Shopify Help: Shopify Catalog and product discovery

Guide: llms.txt

Protocols

ACP vs UCP vs AP2 vs MCP: the standards behind agentic commerce.

Open protocols spare agents from having to understand every store separately. As a merchant you don’t implement them yourself; your platform or payment provider does. You should know what they stand for.

01

The protocols at a glance

All four are openly published. As of October 8, 2026.

ACP, Agentic Commerce Protocol

Who, since when
OpenAI and Stripe, Sep 29, 2025; beta, Apache 2.0, current version 2026-04-17
What for
checkout sessions, product feeds, cart and orders between agent and store. Since March 2026 OpenAI uses it mainly for product discovery.

UCP, Universal Commerce Protocol

Who, since when
Google with Shopify, Etsy, Wayfair, Target and Walmart, Jan 11, 2026; Apache 2.0, current version 2026-08-25
What for
the whole journey from catalog and cart to checkout and orders. Shopify and Shopware support it.

AP2, Agent Payments Protocol

Who, since when
Google with 60+ partners, Sep 16, 2025; v0.2 since Apr 28, 2026
What for
agent-initiated payments, with mandates recording what the buyer approved

MCP, Model Context Protocol

Who, since when
Anthropic; since Dec 9, 2025 at the Agentic AI Foundation (Linux Foundation)
What for
general standard for connecting AI apps to external systems. ACP and UCP can run over it.

Sources:Agentic Commerce Protocol (agenticcommerce.dev)ACP on GitHub (version 2026-04-17)OpenAI: Buy it in ChatGPT, Sep 29, 2025OpenAI: Powering product discovery in ChatGPT, Mar 24, 2026Universal Commerce Protocol (ucp.dev)Google: UCP launch, Jan 11, 2026Google Cloud: Agent Payments Protocol (AP2), Sep 16, 2025ap2-protocol.org (v0.2, Apr 28, 2026)Model Context Protocol: introductionOpenAI: Agentic AI Foundation, Dec 9, 2025

02

What are agentic payments?

Payments an agent initiates for the buyer. Visa (Intelligent Commerce, April 2025) and Mastercard (Agent Pay, April 2025) give agents their own limited payment credentials. PayPal launched “agent ready” for payments and “store sync” to make product data available to AI channels in October 2025.

Sources:Visa Intelligent Commerce, Apr 30, 2025Mastercard Agent Pay, Apr 29, 2025PayPal Agentic Commerce Services, Oct 28, 2025Google Cloud: Agent Payments Protocol (AP2), Sep 16, 2025

03

A note on older articles

Many 2025 articles describe buying inside ChatGPT as the default. OpenAI scaled that back in March 2026; purchases happen on the merchant’s site again. Shopify replaced its old Storefront MCP catalog and cart tools with UCP, and WooCommerce 11.2 removes its experimental agentic checkout APIs.

Sources:OpenAI: Powering product discovery in ChatGPT, Mar 24, 2026OpenAI: chatgpt.com/merchantsShopify.dev: Storefront MCP replaced by UCP (changelog Jun 24, 2026)WooCommerce 11.2 pre-release notes, Sep 21, 2026

Platforms

Where AI agents can buy today: mostly in the U.S.

The major AI platforms have launched shopping features, almost all in the U.S. first. Here is what each requires from merchants.

01

Platforms at a glance

What the providers officially state.

ChatGPT

What works
product discovery and shopping research; checkout on the merchant’s site
Merchant requirements
Shopify or Etsy catalog, or an approved feed; U.S.

Google AI Mode and Gemini

What works
agentic checkout and UCP-powered checkout; merchant stays seller of record
Merchant requirements
Merchant Center with the native_commerce attribute; U.S., Canada, Australia; select merchants

Microsoft Copilot

What works
Copilot Checkout in the chat, with PayPal, Shopify and Stripe
Merchant requirements
Microsoft Merchant Center account and product feed; U.S.

Perplexity

What works
Instant Buy with PayPal, incl. merchants on Shopware, BigCommerce and Wix
Merchant requirements
via PayPal or supported platforms; launched for U.S. users

Sources:OpenAI: chatgpt.com/merchantsGoogle: Agentic checkout, Nov 13, 2025Google Merchant Center Help: UCP-powered checkoutGoogle Merchant Center Help: UCP integration hubGoogle: Agentic commerce updates, Sep 16, 2026Microsoft Advertising: Copilot Checkout, Jan 8, 2026Microsoft Advertising: Agentic commercePerplexity Help: Instant Buy (Sep 14, 2026)

02

How big is it?

Adobe measured a 693.4% jump in traffic from generative AI tools to U.S. retail sites in the 2025 holiday season, while stressing the user base is still modest. Shopify reports AI-referred orders grew nearly 13x in Q1 2026, but organic search still refers more sessions to Shopify merchants than all tracked AI platforms combined.

Sources:Adobe: 2025 holiday season, Jan 7, 2026Shopify Enterprise blog: AI-referred shoppers (Q1 2026 data)

Store platforms

How Shopify agentic works, and what Shopware and WooCommerce offer.

Your store platform handles most of the technology. How far along it is varies a lot.

01

Shopify: on by default, tied to markets

Agentic storefronts are active by default for eligible stores, with no fees. With the default “Allow Shopify to manage for me”, Shopify enrolls your products in new AI channels automatically; you can manage it under Sales channels → Agentic. Every Shopify store automatically serves /agents.md, /llms.txt and /llms-full.txt, and Shopify’s storefront endpoint for agents uses UCP.

Channels depend on markets: ChatGPT and Copilot require selling to U.S. customers, Google also requires a U.S.-based business, Meta selling to the U.S., Canada or Mexico. Only direct-to-consumer sales qualify.

Sources:Shopify Help: Agentic storefrontsShopify Help: Managing agentic storefrontsShopify Help: Shopify Catalog and product discoveryShopify Help: Selling on ChatGPTShopify Help: Selling on Google AI Mode and GeminiShopify Help: Selling on Microsoft CopilotShopify Help: Selling on MetaShopify.dev: Agents and UCP

02

Shopware: “Agentic Commerce” extension in beta

The extension publishes a UCP profile at /.well-known/ucp, manages agents.md and llms.txt, and generates product feeds for OpenAI and Google. You switch capabilities such as catalog, cart, discounts, checkout and orders on individually. The MCP transport requires Shopware 6.7. Per Shopware, ChatGPT registration is currently U.S. only.

Source:Shopware docs: Agentic Commerce

03

WooCommerce and others

WooCommerce says it is working with Stripe on ACP; its MCP server (since 10.3) is for store management, not selling to agents. We found no official merchant guide for AI channels.

Stripe’s Agentic Commerce Suite offers one integration for multiple agents, using UCP or ACP, and Stripe lists Wix, Etsy, WooCommerce, Squarespace and BigCommerce among platforms using it.

Sources:WooCommerce: AI & agentic commerce, Oct 3, 2025Stripe: Agentic Commerce Suite, Dec 11, 2025Stripe docs: Sell through agents

For your store

What a small store should do now: seven steps.

Our recommendation, based on the sources above: let your platform handle protocols and checkout, and put your effort into what every agent needs: readable pages, complete product data and answers to the questions customers ask before buying.

01

Seven steps for any store

The first five are one-off; the last two are ongoing.

  1. Allow AI crawlers, at least OAI-SearchBot and Googlebot, including at your CDN and in security plugins.
  2. Complete your product data: detailed descriptions, several images, variants, price, availability, genuine reviews.
  3. Fill in and link your terms, privacy and refund policies; Shopify requires them for AI channels.
  4. Keep Google Merchant Center clean; it’s the basis for products in AI Mode and for UCP checkout. For Copilot, set up Microsoft Merchant Center.
  5. Check what’s already running: on Shopify under Sales channels → Agentic, on Shopware via the Agentic Commerce extension.
  6. Publish buying guides that answer pre-purchase questions. ChatGPT’s shopping research reads public product pages and guides and cites its sources.
  7. Measure whether AI assistants mention your store for buying questions, and refine.

Sources:Shopify Help: Managing agentic storefrontsShopify Help: Selling on ChatGPTGoogle Merchant Center Help: UCP-powered checkoutMicrosoft Advertising: Agentic commerceShopware docs: Agentic CommerceOpenAI: chatgpt.com/merchants

Free AI crawler checker
02

Where the line is

Feeds, UCP profiles and checkout belong to your platform and payment provider. The content agents and AI answers cite, such as guides, comparisons and answers to buying questions, is yours to write or delegate. Claire finds and closes the gaps there and measures the impact.

Claire for Shopify

Questions

Good to know.

What is agentic commerce?

Shopping where an AI agent searches, compares, builds a cart and prepares or, after approval, completes the purchase on someone’s behalf, for example in ChatGPT, Google’s AI Mode, Copilot or Perplexity.

What is agentic shopping?

The consumer side of agentic commerce: you tell an AI assistant what you need, and it researches options, compares them and can complete the purchase with your approval.

What’s the difference between ACP and UCP?

ACP (Agentic Commerce Protocol) comes from OpenAI and Stripe; UCP (Universal Commerce Protocol) from Google with Shopify, Etsy, Wayfair, Target and Walmart. Both connect agents and stores; UCP explicitly covers the whole shopping journey. Shopify and Shopware support UCP, while OpenAI uses ACP mainly for product data.

What are agentic payments?

Payments an agent initiates for the buyer, using schemes such as Google’s AP2, Visa Intelligent Commerce or Mastercard Agent Pay. They record what the buyer approved and limit what the agent may spend.

How does Shopify agentic work?

Shopify’s agentic storefronts are on by default for eligible stores and share your catalog with AI channels like ChatGPT, Google AI Mode and Gemini, Copilot and Meta. Eligibility depends on market: ChatGPT and Copilot require selling to U.S. customers, Google also a U.S.-based business.

Do I need to do anything as a Shopify merchant?

Not to turn it on. Check Sales channels → Agentic to see your channels and listing quality, complete your store policies, and improve descriptions, images, variants and reviews.

What does agentic commerce cost merchants?

Shopify lists no fees for agentic storefronts or selling on ChatGPT, and OpenAI charges no fees on purchases that start in ChatGPT. You still pay your usual payment processing and the effort to keep product data current.

What is /agents.md?

A file that tells AI agents how to interact with your store. Shopify serves it automatically for every store, with /llms.txt mirroring it; Shopware’s Agentic Commerce extension manages agents.md and llms.txt.

About this guide

Author, method and sources

Written by the Claire team at wordsmattr GmbH in Vienna. Claire is our own product, your AI colleague for visibility in ChatGPT and Google: she finds where you’re missing, closes the gaps and shows you the results. First published on , last checked against the sources on . We review this guide every quarter and whenever a provider changes its documentation.

How we researched

  • Search demand: Google Ads via DataForSEO, United States, retrieved Oct 8, 2026: “agentic commerce” 5,400 a month (3,600–8,100 over 12 months), “agentic commerce protocol” 1,000, “universal commerce protocol” 1,000.
  • Search results: Google top 10 with “People also ask” for “agentic commerce”, “what is agentic commerce” and “agentic commerce protocol” (U.S.), retrieved Oct 8, 2026. Payment companies and large platforms rank there; a hands-on guide for small stores is missing.
  • Facts: only official pages from OpenAI, Stripe, Google, Shopify, Shopware, WooCommerce, Microsoft, Perplexity, Visa, Mastercard, PayPal and Adobe plus the specs on GitHub, all retrieved Oct 8, 2026.

Sources, all retrieved on October 8, 2026

  1. Google Search Central: Optimizing for generative AI features (updated Jul 10, 2026)
  2. Agentic Commerce Protocol (agenticcommerce.dev)
  3. ACP on GitHub (version 2026-04-17)
  4. OpenAI: Buy it in ChatGPT, Sep 29, 2025
  5. OpenAI: Powering product discovery in ChatGPT, Mar 24, 2026
  6. OpenAI: chatgpt.com/merchants
  7. Universal Commerce Protocol (ucp.dev)
  8. Google: UCP launch, Jan 11, 2026
  9. Google Merchant Center Help: UCP-powered checkout
  10. Google Merchant Center Help: UCP integration hub
  11. Google: Agentic commerce updates, Sep 16, 2026
  12. Google: Agentic checkout, Nov 13, 2025
  13. Google Cloud: Agent Payments Protocol (AP2), Sep 16, 2025
  14. ap2-protocol.org (v0.2, Apr 28, 2026)
  15. Model Context Protocol: introduction
  16. OpenAI: Agentic AI Foundation, Dec 9, 2025
  17. Visa Intelligent Commerce, Apr 30, 2025
  18. Mastercard Agent Pay, Apr 29, 2025
  19. PayPal Agentic Commerce Services, Oct 28, 2025
  20. Perplexity Help: Instant Buy (Sep 14, 2026)
  21. Microsoft Advertising: Copilot Checkout, Jan 8, 2026
  22. Microsoft Advertising: Agentic commerce
  23. Stripe: Agentic Commerce Suite, Dec 11, 2025
  24. Stripe docs: Sell through agents
  25. Shopify Help: Agentic storefronts
  26. Shopify Help: Managing agentic storefronts
  27. Shopify Help: Shopify Catalog and product discovery
  28. Shopify Help: Selling on ChatGPT
  29. Shopify Help: Selling on Google AI Mode and Gemini
  30. Shopify Help: Selling on Microsoft Copilot
  31. Shopify Help: Selling on Meta
  32. Shopify.dev: Agents and UCP
  33. Shopify.dev: Storefront MCP replaced by UCP (changelog Jun 24, 2026)
  34. Shopify Enterprise blog: AI-referred shoppers (Q1 2026 data)
  35. Shopware docs: Agentic Commerce
  36. WooCommerce: AI & agentic commerce, Oct 3, 2025
  37. WooCommerce 11.2 pre-release notes, Sep 21, 2026
  38. Adobe: 2025 holiday season, Jan 7, 2026
  39. allbirds.com/llms.txt (Shopify store)

More guides

Keep reading. Same rules: answer first, sources dated.

All guides

Agents buy where they find answers. Does AI name your store yet?

Claire’s free AI visibility check asks Google’s Gemini up to 18 buying questions from your market, live and with web search, and shows whether your store is named and whom the AI recommends instead. Claire then closes the gaps and measures the impact.

  • Real buying questions from your market
  • Who gets named instead of you
  • Free, about 4 minutes
Check your AI visibility