Check agent checkout before an AI agent closes your sale

If an AI agent can finish your store's order while you are asleep, the first check is authorization, not traffic. On September 28, Shopify expanded WebMCP so agents such as Meta's Muse and Instinct could complete checkout across more than two million merchant stores. That makes agent checkout a real order path, not a demo.

The update added three tools named get_checkout, update_checkout, and complete_checkout. The tools cover viewing checkout information, modifying address or delivery choices, and submitting an approved order. For a solo operator, that path has a new failure mode: the agent can finish what a human would have abandoned, or it can fail silently.

Run this checklist before you rely on agent checkout.

• Open the agent channel setting and confirm it matches your policy.
• Review one product page for missing data that would stop an agent.
• Locate one recent agent order and calculate its margin.

The checklist runs in order: authorization can stop the channel before it sells, catalog determines whether the agent can finish, and margin tells you whether the finished sale is worth keeping.

Authorization is the first check because the default may already be on

Shopify made Shop Pay checkout the default for eligible US merchants. Shopify auto-enrolled merchants in direct checkout unless they turned it off in Sales channels > Agentic > Meta channel > Direct checkout. If you never looked, the channel may already be open. That is fine if you want it, and dangerous if you are selling items you would not want an agent to close without your review.

A solo operator does not need a policy document. You need one decision: should an agent be able to place an order without a person reviewing it? If yes, leave the toggle on and write the date you checked it. If no, turn it off and treat any agent order as an exception. The setting is cheap to verify. The surprise is expensive.

If you sell items that are easily misread or hard to reverse, default to off. If you sell simple goods with clear variants, default to on is defensible. Judge the agent by the cost of a mistake. If a wrong order would be easy to fix, the channel can stay on.

Clean product data is the second check because agents stop at gaps

An agent follows the data it can read. If a variant has no stock, a shipping option is missing, or a title is too vague to choose, the checkout may stop. For a small catalog, one broken product can look like a store-wide problem. Fix the obvious gaps first: complete titles, clear variant names, accurate stock, and a delivery option the agent can select.

Start with the product an agent is most likely to buy. If your store sells a small set of repeat items, those are the ones. Check the name, the variant, the price, the stock, and the shipping choice. If a human can hesitate, an agent may not. It will either submit an order or stop. Either outcome can cost you a sale or create a support ticket.

Do not chase perfect data. Fix the fields that block checkout. A beautiful description does not help if the variant is missing. A missing delivery detail may not stop the sale, but it can increase the hours you spend later.

Margin visibility is the third check because a sale is not profit

Shopify takes a portion of Shop Pay transaction volume whenever an agent completes a sale. That cut is small enough to ignore only if you can see it. If agent orders arrive without a way to identify them, you are guessing. Build a simple view: agent orders, product margin, shipping cost, and the platform fee. Then you can decide whether the channel is worth keeping.

A small order can still be a good order if it is easy to fulfill. A large order can be a bad order if it ships slowly, needs a return, or triggers a fee you did not expect. The audit does not need a dashboard. It needs one number you can trust: the margin after the platform fee and shipping. If you cannot produce that number for a recent agent order, the channel is not ready to handle more volume.

Count the hours too. If an agent order takes long to verify and fulfill, the margin is negative even when the price looks good.