Muse, Shopify and Stripe: what to do now in your online shop

Since 8 September, Meta's personal AI agent Muse has been able to make purchases online on the user's behalf, and it asks for confirmation before it pays. This is agentic commerce. Muse is rolling out in the United States, so for now it concerns an Italian shop only if the shop sells to American customers. If you use Shopify and sell in the United States, check which agentic channels are already switched on; otherwise it is enough to prepare data, rules and payments.

What happened

• On 8 September Meta introduced Muse, an agent that sends emails, books travel and shops for the user. It pays with Link, Stripe's wallet for agents, which generates a single-use card, and it asks for confirmation before purchases. Meta says Muse cannot see passwords or payment methods.
• On 20 September Amazon blocked Muse. According to Amazon, the agent does not identify itself when it buys, and anyone buying on customers' behalf should operate openly and respect the provider's choice to take part or not.
• On 28 September Shopify announced that checkout, Shop Pay included, supports WebMCP, a proposed standard for agents that work in the buyer's browser; the rollout covers all eligible merchants. Three tools (get_checkout, update_checkout, complete_checkout) let an agent read the checkout, change the address or delivery option and submit the order with the buyer's authorisation.
• On 6 October Meta and Sierra presented the Personal Agent Protocol, an open standard on authentication and visibility of agents: the consumer decides what access their agent gets, the company what it can do. Named partners include Genesys, Instinct, Rocket, Shopify, Stripe and Walmart, and version 0.1 of the specification is planned for later in October.

Channels and conditions

For Meta and ChatGPT, Shopify states only the usual payment processing fees. In Meta's direct checkout the merchant stays merchant of record and keeps handling fulfilment, returns and customer service. Mark Zuckerberg has said, however, that Meta expects to profit over time from "a small fee from transactions"; Mediaweek reports the remark without saying who would pay it.

What it means for an Italian shop

According to Meta's pages, Muse is not available to an Italian buyer today: they name the United States and cite no European country. For a shop that sells only in Italy, we think there is nothing to switch on today.

Shops that sell to US customers are in a different position. On Shopify the ChatGPT channel is on by default even for shops based outside the United States, provided they sell to American customers, and the same goes for Meta's direct checkout, shown to customers in the United States, Canada and Mexico. An Italian exporter may therefore already have an agentic channel switched on.

What to do now

Available today are Shopify's channels for US buyers and Stripe's documentation for sellers. Still only announced are Shop Pay inside Muse, which Meta lists as coming soon, and version 0.1 of the Personal Agent Protocol.

1. Look at who visits the shop: in the logs or in your protection layer (CDN, firewall) see which bots arrive, then decide which agents to accept and which to limit, and write it into the terms of use.
2. Align title, price, availability, shipping and returns across site, feed and checkout, and complete the terms of service, privacy and returns pages. Stripe warns that a price different from the one shown makes checkout fail, and says that updating stock and prices every 15 minutes is usually enough.
3. If you use Shopify and have customers in the United States, Canada or Mexico, open Sales channels, then Agentic, and check which channels are on. Meta's direct checkout is on by default for eligible stores (products accepted in Shopify Catalog, the Agentic Storefronts supplemental terms accepted, complete policy pages); it does not support subscriptions, bundles, customisable products, B2B-only products, local delivery or in-store pickup, and third-party analytics pixels do not fire.
4. If you take payments with Stripe, open the Agentic commerce page in the Dashboard; the documentation lists Italy among the supported countries. You need a profile with terms, privacy and returns, a tax code for each taxable product and a catalogue feed in CSV; the link to an agent starts with "Request connection" and the agent must accept it. You can test everything in the sandbox.
5. Ask your payment provider how it handles SCA and disputes for orders started by an agent.

For now you can postpone rebuilding the checkout and choosing a protocol: Shopify is extending WebMCP to eligible merchants, so we think anyone on its checkout does not need to act, and for everyone else it is better to wait for specification 0.1.

Where we start

The news touches our work on websites and e-commerce, from catalogue to checkout. We are a Stripe partner, and we cite Stripe often in this article. SpaceClub, our own product where venues sell tickets and book tables, is also built on Stripe.

If you ask us to look at your shop, we start from four checks: the agentic channels already on, whether product data and policy pages are complete, the checkout features the channels do not support, and what the payment provider says about SCA and disputes. Then we write down what to do now and what to wait for, with a quote and a roadmap agreed before touching anything. We cannot promise that an agent will pick your products.

What we do not know yet

• There is no date for Italy: Meta names no European country and Shopify's pages ask for customers in the United States, Canada or Mexico.
• It is unclear who would pay the fee Zuckerberg mentioned; today Shopify states none beyond payment processing fees.
• Stripe lists Italy but does not say which agents will accept the connection request of an Italian seller.
• Version 0.1 of the Personal Agent Protocol is still to come, and it is unclear how it will combine with the UCP that Shopify uses for agent checkout.
• The pages consulted do not say who bears the cost of a wrong purchase by an agent.

If you want us to look at your shop, see how we work in websites and e-commerce or get in touch.

Sources

• Introducing Muse: The World's First Personal AI Agent Built for Everyone (Meta, 8 September 2026)
• Meta Muse puts brands in front of a new kind of shopper (Mediaweek, 24 September 2026)
• Amazon blocks Meta's Muse agent from shopping on users' behalf (SiliconANGLE, 21 September 2026)
• Shopify opens checkout to browser-based AI agents (TechCrunch, 28 September 2026)
• Selling on Meta (Shopify Help Center)
• Selling on ChatGPT (Shopify Help Center)
• Introducing Personal Agent Protocol (Sierra, 6 October 2026)
• Sell through agents (Stripe Docs)
• Agentic commerce in Italy (Stripe, updated 10 June 2026)