Shopify launched a new service called Shop MCP on October 13, 2026. Now any AI agent or app can search more than 1 billion products in the Shopify catalog, build a cart, and complete payment through Shop Pay — all via a single MCP connection. The service is live at mcp.shop.com. According to the company's official announcement, catalog search requires no API key, and existing Catalog API integrations continue to work unchanged.

One Connection — 17 Tools

Shop MCP gives agents 17 tools through a single connection. They include search_catalog (catalog search), lookup_catalog (catalog lookup), get_product (product details), cart assembly, and checkout creation right in the merchant's store. In other words, the agent carries out the entire process — from search to payment — through one interface, with no need to write a separate integration for each step.

The service's usage instructions are published as an open document: mcp.shop.com/skill.md. Agents connect based on the description in that document and call the available tools. A single connection opens all 17 tools at once — no extra configuration or separate permissions are required.

The key point: catalog search works without an API key. That means developers can access catalog data without registering or obtaining a key. Such direct access to a catalog covering more than 1 billion products opens up broad possibilities for agents. At the same time, integrations already working with the Catalog API are unaffected: Shopify specifically noted that their behavior will not change, so the old and new paths work in parallel.

Shop MCP lets any AI agent or app search the Shopify catalog, build a cart, and complete payment via Shop Pay — all through a single MCP connection. — Official Shopify announcement, October 13, 2026.

The Shopper Signs In Once; the Agent Handles the Rest

The service works through the Sign-in with Shop mechanism: the shopper signs in once, after which the search tools use their saved sizes and preferences. For example, the agent will not ask the shopper again for a clothing size or delivery address — that data comes from the Shop profile. After a single sign-in, the agent does not have to re-ask for the shopper's personal settings every time.

In the next step, the agent assembles the cart and creates a checkout in the merchant's store on the shopper's behalf. The payment is prepared by the agent up to the final stage, but the transaction itself takes place in the store where the product is sold. In other words, the money moves not in the agent's own system but in the merchant's official store. In this model, the shopper entrusts personal data not to the agent but to the Shop system; the merchant keeps the store's standard checkout flow and continues to use the Shop Pay infrastructure.

From Select Partnerships to an Open Ecosystem

According to The Verge's report on October 13, with this move Shopify is opening its catalog to a wider range of AI agents. Previously, agentic commerce was available only within select partnerships — meaning agent-based access to the catalog required a separate agreement, with each partner working with Shopify individually.

Now any agent or app gets this capability through an open document and a single connection. Access previously limited to select partnerships is now offered to any compatible agent through an open standard. Shopify's catalog of more than 1 billion products is now open through this standard all at once — agent developers no longer depend on bilateral agreements to work with the catalog; a single shared connection suffices. This change also simplifies the relationship between catalog owners and agent builders in agentic commerce: the connection rules are the same for everyone, and the document is open.

Shopify separately emphasizes that catalog search works without an API key. In practice, this means a developer does not need to register in advance or obtain a special key to send queries across more than 1 billion products in the catalog. The low barrier to entry makes it easier for small teams and solo developers to try agentic commerce features.

At the same time, the service does not break the existing ecosystem. Integrations already operating through the Catalog API continue their work unchanged — Shopify specifically noted this in its official announcement. So the familiar old path stays for businesses, while the new Shop MCP works as an additional parallel channel. Both paths rely on the same catalog — more than 1 billion products.