AI agents can now finish checkout on your Shopify store
and where the shopper still takes over
Two weeks back I shared that Shopify turned on WebMCP for every store. An AI agent could search a store, open a product and fill the cart. Then it stopped at checkout and handed things back to the shopper.
That stop is gone now. On September 28, Shopify added WebMCP tools to checkout itself. An agent in a shopper's browser can place the order once the shopper says yes.
It's rolling out to eligible Shopify stores, with no setup needed on your side.
Shopping with an agent "shouldn't feel like watching paint dry", said Gil Greenberg, a product manager for agentic commerce at Shopify. Until now, an agent that went past the cart had to click through a page built for people.
Source: Shopify developer changelog
This is the second agent checkout in two weeks. Meta's direct checkout runs inside Meta and the shopper never lands on your site.
This one runs on your checkout page, in the shopper's browser.
What an agent can do at checkout
Shopify's docs list four new tools:
get_checkout reads the checkout as it stands and the receipt once the order is placed
update_checkout fills in or changes the checkout details
complete_checkout places the order
navigate_to_storefront leaves checkout and goes back to the store
The agent can fill in the shopper's email, phone and shipping address, or pick a pickup location instead. It can also choose the delivery option, apply a discount code and pay with a saved Shop Pay card.
It can't change what's in the cart. That stays with the shopper.
Before placing the order, the agent has to show the shopper the order and the total and get a yes. Shopify's docs set that as a rule for anyone building an agent.
Source: Shopify developer docs
For now, agents need a Chromium-based browser for this. Shopify also asks each agent to sign its requests, so it knows which agent is placing an order.
Where the shopper takes over
Some steps still need the person. Shopify hands control back for signing in to Shop Pay and for a bank check on the card, like 3D Secure.
It also hands back at any checkout step your store has set to block the order until someone acts on it. That's the one you control.
Checkout apps can add steps like an age check or a required terms box. The shopper completes them on the page and the agent takes it from there.
What to check on your store
Three checks to run this week:
1/ Place a test order through your checkout and note every step an app has added. Each one is a point where an agent hands the order back to the shopper.
2/ If you have physical stores, turn on pickup for each location in Settings > Shipping and delivery > Pickup in store. At checkout, an agent picks from the pickup locations you've set up. I covered that setting earlier this month.
3/ Move colour and size out of titles and tags, into real product options. When I tested an Everlane product with WebMCP two weeks back, colour was a word in the title and a tag. The agent picks the variant before it reaches checkout.
Shopify has made the last step something an agent can finish. Getting there with the right product depends on the catalog.
Across a sample of 400,000+ live Shopify products, we found 51% of what a shopper asks about sits somewhere in readable text. Only 6% of that is filterable.
Atomz fixes that layer, assigning categories and filling in the attributes an AI shopping agent reads. Get in touch for a demo walkthrough.
The audit shows what an AI agent reads from your catalog and how you compare with competitors for the same shopper queries. Audit now →
- Ankit
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