Shopify opens its checkout to browser-based AI agents

Shopify announced on Monday that browser-based AI agents can now complete purchases on its merchants' sites, extending what they can do beyond searching for products and adding them to a cart. The company said the feature is rolling out to all eligible merchants.

Three tools for an agent-run checkout

The update brings WebMCP, a proposed standard Shopify already supported for storefronts and carts, to the checkout itself, including Shop Pay. Agents can read the checkout screen, update it and submit the transaction once the buyer authorizes the purchase, the company said, so there is no need to rely on screenshots or to scrape pages built for humans.

Shopify exposes the capability through three tools: get_checkout, update_checkout and complete_checkout. An agent can inspect the state of a checkout, change details such as the customer's address or delivery option, and place the order after the shopper confirms it.

WebMCP, MCP and the Universal Commerce Protocol

Shopify already offers a hosted Model Context Protocol (MCP) server for agents that work server to server; WebMCP is aimed at agents that run inside the buyer's browser. Both build on the company's Universal Commerce Protocol (UCP), a common way to search for and discover products, build carts and check out.

"If your agent is operating in the buyer's browser, use WebMCP tools provided on storefront and checkout to efficiently complete order placement, instead of navigating HTML built for humans," said Gil Greenberg, a staff product manager working on agentic commerce at Shopify, in a post on X. The tools, he said, are structured APIs designed through UCP to ensure accurate commerce facts, required disclosures and handoff requirements.

Against the grain of other retailers

The rollout comes as some large retailers move the other way. Amazon recently blocked Meta's Muse AI agent from making purchases on its retail site, and Adidas has reportedly done the same. Muse and another shopping agent, Instinct, already have direct partnerships with Shopify; the Instinct deal was announced the same day.

For merchants, the practical effect is that agent traffic can now reach the order itself, so product data, delivery options and disclosure rules have to be accurate in the structured layer of a storefront, not only on the page a human sees.