Your Shopify catalog can now sell inside ChatGPT and Perplexity, and the fee picture is still forming

Agentic commerce, where an AI assistant helps a shopper find a product and complete the purchase inside the chat, moved from demo to a real sales channel in 2026. Shopify put the clearest marker down: it announced Agentic Storefronts in its Winter 26 Edition on 10 December 2025 and has been rolling the feature out to stores since. It syndicates your Shopify Catalog into AI chat surfaces, ChatGPT, Perplexity and Microsoft Copilot, with others noted as coming soon, so a shopper can discover and buy your product inside the conversation rather than clicking through to your site. Checkout is powered by Shopify checkout, you choose whether the buyer completes in-chat or is sent to your store, and every order flows into your admin with full AI-channel attribution.

What it costs to sell through it

On the Shopify side the answer is reassuringly plain. Shopify does not charge an activation fee, an added platform fee or a revenue share for the channel itself; you pay the same payment processing you already pay on any order, roughly 2.9 percent plus 0.30 dollars on a card sale through Shopify Payments. So an in-chat sale that settles through Shopify checkout costs about what the same sale costs on your own storefront. The syndication of your catalog into the assistants is free to switch on.

The catch: each AI surface sets its own terms, and they keep changing

The fee you can predict is Shopify’s. The one still forming is the assistant’s, and it is genuinely a moving target. OpenAI’s ChatGPT Instant Checkout, the buy-in-chat flow built with Stripe, launched with a reported roughly 4 percent service fee for Shopify merchants on completed in-chat sales, with a 30-day free trial from the first qualifying order, on top of your normal processing. But that native buy-in-chat flow did not take: only about a dozen Shopify merchants ever went live with it, and by March 2026 OpenAI had stepped back from standalone Instant Checkout toward a model where ChatGPT helps a shopper discover and compare a product while the purchase completes on the merchant’s own site or inside a retailer app such as Instacart, Target or Expedia. Where the sale finishes on your own checkout you pay your usual processing and OpenAI takes no in-chat cut; where a surface keeps a native checkout it can still charge for the placement. So the honest read is that the Shopify line is known, the per-assistant line is not standardised, and OpenAI’s own flow is currently moving toward discovery in the chat with checkout back on your site.

Why the payment networks just piled in

June 2026 showed how fast the plumbing is being built. On 10 June 2026 Visa announced a partnership with OpenAI to let AI agents pay with tokenised Visa credentials inside OpenAI’s experiences, operating within set spending limits, merchant categories and approval controls, and Mastercard unveiled its own framework, Agent Pay for Machines, the same day. When the largest card networks are wiring up agent-led checkout, the channel is worth understanding now rather than after it is everywhere.

The half most stores miss: getting found in the answer

A buy button inside a chat only matters if your product is the one the assistant surfaces. That is the same visibility problem as being cited by an AI answer: the assistant has to reach, read and trust your product data before it can offer it. Shopify’s syndication handles the feed for its own merchants, but the broader signals still decide whether you appear at all, clean and structured product data, letting the retrieval crawlers in, and being a source the model is willing to quote. Winning the placement is upstream of the checkout fee.

Our free e-commerce fee calculator adds up the payment, platform and transaction fees on an order so you can see what actually lands in your account, and our breakdown of what a year of online sales really costs in fees walks the same maths at scale; neither was built with a per-assistant checkout fee in it, so add that surface’s cut on top when a sale closes in-chat. On the discoverability side, our free AI search visibility auditor checks whether your pages can be reached and quoted by the answer engines, and our guide on how to get cited by ChatGPT and Perplexity covers the signals that get you surfaced.