Storefront Catalog MCP now implements UCP
Shopify developer change
MerchantDiff detected this entry in Shopify's official developer changelog on April 22, 2026.
This Shopify update is categorized as Action Required, API, Breaking API Change.
What changed
The following UCP catalog tools in Storefront Catalog are now available: - `search_catalog`: Search a store's product catalog with filters, pagination, and buyer context - `lookup_catalog`: Batch lookup products or variants by identifier with inputs correlation - `get_product`: Retrieve full product details with interactive variant selection, availability signals, and more Tool calls can be placed against the https://{storedomain}/api/ucp/mcp endpoint.
Who is affected
Apps and storefronts using the affected Storefront API surface should review this change.
What action may be needed
The previous search and lookup tools are deprecated in favor of the above tool names and endpoint, as well as related updates to their request and response shapes to match UCP. The old versions will be maintained until June 15th, 2026, but all documentation will refer to the latest version. If you’re building with Storefront MCP tools: Update tool names to one of the supported tools above. Update endpoints to use https://{storedomain}/api/ucp/mcp.
Use the official Shopify entry below as the source of truth for technical implementation details, affected APIs, migration instructions and deadlines.
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