Sound familiar?
- You hear AI assistants are recommending products, but yours never appear
- Your product data has missing GTINs, vague titles and stock that is hours out of date
- An agency is selling agentic checkout to you without saying it is not available to UK shoppers yet
- Your shop is on WooCommerce, OpenCart or a custom build, not Shopify
- Prices and availability in your Google Merchant Center feed disagree with the website
- You want to be ready for AI checkout without rebuilding the shop
Key facts
- OpenAI and Stripe released the Agentic Commerce Protocol (ACP) in September 2025 alongside Instant Checkout in ChatGPT
- On 24 March 2026 OpenAI said it would let merchants use their own checkout while it focuses on product discovery
- Google announced the Universal Commerce Protocol (UCP) in January 2026, co-developed with Shopify and major retailers
- UCP is open source under Apache 2.0 and covers catalogue, cart, checkout, identity linking and orders
- Google's Merchant Center help says UCP-powered checkout applies to products eligible in the US, Canada and Australia
- We found no primary source confirming in-chat checkout for UK shoppers as of 11 November 2026
- Product discovery in AI assistants depends on complete, accurate product data now, wherever checkout happens
What agentic commerce means
Agentic commerce is shopping where an AI assistant does some of the work: it finds products, compares them, answers questions and, in some markets, completes the purchase for the shopper. For a merchant there are two separate things to get right:
- Being understood: the assistant can find your products and trusts your price, stock, delivery and returns information.
- Being buyable: the assistant can put an order through to you, with you as the merchant of record, using a standard protocol.
The first matters today in the UK. The second is moving quickly and is mostly not live for UK shoppers yet, as set out below. We would rather tell you that than sell you something you cannot use.
The protocols, and what is live versus announced
We checked each of these against the companies' own pages on 11 November 2026.
| Platform | What it is | Status we found |
|---|---|---|
| OpenAI Agentic Commerce Protocol (ACP) | Open protocol co-developed by OpenAI and Stripe, covering product feeds, checkout and delegated payment | Instant Checkout launched in ChatGPT in September 2025 for US users. On 24 March 2026 OpenAI said merchants can use their own checkout while it focuses on product discovery. Shopify's help centre now describes ChatGPT as discovery-focused, with purchases completed on the store's own checkout. |
| Google Universal Commerce Protocol (UCP) | Open standard announced in January 2026 for agents to search catalogues, build carts, check out and manage orders; works over REST, JSON-RPC, MCP and Agent2Agent | Google's Merchant Center help says UCP checkout applies to products eligible in the US, Canada and Australia, for select merchants with Google's approval and a Google Pay payment handler. No UK date confirmed. |
| Shopify Agentic Storefronts | Shopify syndicates products from Shopify Catalog to AI channels | Shopify says it is on by default for eligible stores and lists ChatGPT, Google AI Mode and Gemini, Microsoft Copilot and Meta. Direct checkout on Google, Microsoft and Meta applies only where activated. |
In short: UK shops can be discoverable in AI assistants now. Native checkout inside an assistant for UK shoppers was not confirmed in any primary source we found. These programmes change monthly, so we recheck at the start of every project.
Product data is the work that pays off now
Whatever happens with checkout, assistants recommend products they can understand. That depends on data you control:
- Identifiers: GTINs, MPNs and brand on every product that has them.
- Titles and attributes that say what the thing is: size, material, compatibility, colour, in structured fields rather than buried in a description.
- Live price and stock: OpenAI's ACP documentation says a structured feed helps ChatGPT show up-to-date price and availability, and Google Merchant Center disapproves listings whose feed disagrees with the landing page.
- Policies: delivery times, costs and returns, as structured data as well as text.
- On-page structured data: schema.org
ProductandOffermarkup that matches the feed exactly.
Much of this is the same feed and stock-sync work we have done since our OpenCart bulk product loading and stock feed days, applied to new destinations. If you also want your brand cited in AI answers, our sister site Search Engine Tuning covers AI visibility.
Shopify, WooCommerce and custom shops
Shopify merchants get much of the plumbing through Shopify Catalog and Agentic Storefronts. Our work there is data quality, settings and any custom logic through a Shopify app.
WooCommerce, OpenCart, Magento and custom shops need the feeds and protocol endpoints built. We generate the ACP and Merchant Center feeds from your catalogue, push price and stock changes as they happen, and, where your market is eligible, implement the UCP or ACP checkout endpoints: create and update a checkout session, confirm the order, then send order events back by webhook. Orders land in your normal order flow and on to your ERP or accounts, flagged by channel.
Getting ready without over-spending
Our advice for most UK merchants today: fix product data and feeds first, because that helps in Google Shopping and AI discovery immediately. Build the checkout integration when your platform and market are confirmed, using the protocol your channels actually support. We start with a free chat and a short audit, then give a fixed-price quote for the data work, with any protocol integration quoted as a separate phase.
What we deliver
- An audit of your product data, feeds and structured data against the platforms' requirements
- Clean product feeds for Google Merchant Center and OpenAI's ACP product feed format
- schema.org Product, Offer and MerchantReturnPolicy structured data on product pages
- Near real-time price and stock updates from your shop or ERP to each feed
- A UCP or ACP checkout integration where your market and platform are eligible
- Order, refund and webhook handling so agent-originated orders reach your systems
- A short written readiness report on what is live, in preview or announced in the UK
How it works and what it costs
Every project gets a fixed-price quote after a free initial chat and a short scoping stage. You own the code and the data.
Free chat
Tell us the problem in plain English: what you do now, what goes wrong and what "better" looks like. No charge, no obligation.
Scoping
We map the processes, systems and data involved, agree what is in and out, and write it down so there are no surprises.
Fixed-price quote
You get a fixed price for the agreed scope, or a phased plan for bigger builds, so you can start small and prove it works.
Build and test
We build in short stages you can see and try, test against real data, then go live carefully with a rollback plan.
Hand over and look after
You own the code and the data. We can host it, support it and keep improving it, or hand it to your own team.
Frequently asked questions
Can UK shoppers buy inside ChatGPT or Gemini yet?
We found no primary source confirming it as of 11 November 2026. Google's Merchant Center help limits UCP checkout to products eligible in the US, Canada and Australia, and OpenAI moved ChatGPT towards discovery with checkout on merchants' own sites in March 2026. dijitul developments rechecks this at the start of every project.
What is the Agentic Commerce Protocol?
The Agentic Commerce Protocol (ACP) is an open standard co-developed by OpenAI and Stripe, released in September 2025. It defines how merchants share product feeds, how an AI agent creates and completes a checkout, and how payment details are passed securely. dijitul developments can build ACP feeds and endpoints for non-Shopify shops.
What is Google's Universal Commerce Protocol?
UCP is an open-source standard announced by Google in January 2026 and co-developed with Shopify and large retailers. It covers catalogue search, carts, checkout, identity linking and order management, and works over REST, JSON-RPC, MCP and Agent2Agent. Merchants stay the merchant of record.
Is it worth doing anything now?
Yes: product data. AI assistants and Google Shopping both depend on accurate identifiers, attributes, prices, stock and policies. Fixing feeds and structured data helps today and is a prerequisite for any agentic checkout later. dijitul developments usually quotes that as phase one.
We are not on Shopify. Can we still take part?
Yes. Both ACP and UCP are open protocols, so WooCommerce, OpenCart, Magento and custom shops can implement them. dijitul developments builds the product feeds, stock updates and checkout endpoints from your existing catalogue and order system, then connects resulting orders to your ERP or accounts.
How is agentic commerce work priced?
dijitul developments gives a fixed-price quote after a free chat and a short audit of your product data and platform. Data and feed work is usually quoted first; protocol checkout integration is quoted separately once your market and channels are confirmed as eligible.
Related
Tell us what you need to build
Free chat, clear scope, fixed-price quote. You own everything we build.