Changelog

Notable changes to Catalog Search. We use calendar versioning (YYYY.MM.DD).

UCP Catalog Update

v2026.04.22· April 22, 2026

Shopify's Storefront Catalog MCP now implements UCP. We've rolled out reference docs, a live demo, and a few UX updates so merchants and developers can work with the new protocol ahead of the June 15, 2026 sunset of the old tool names. A couple of unrelated features shipped in the same release.

In response to the UCP rollout

  • Expanded UCP reference docs at /learn/ucp with the three-tool breakdown, JSON-RPC 2.0 request shape, buyer-context fields, match correlation, and the June 15, 2026 sunset timeline.
  • New "Try UCP" demo at /demo/ucp: call the three UCP tools (search_catalog, lookup_catalog, get_product) live against any Shopify store with a tabbed request/response preview.
  • ProductModal option pills now show UCP-style availability signals (selectable, out-of-stock, or does-not-combine) derived from variant data.
  • GEO scoring rubric rebuilt around what UCP actually surfaces to agents: new factors for taxonomy coverage, seller policy presence, option structure, and description HTML fidelity.

Also in this release

  • New product comparison view at /compare: pick up to three products from search results and see price, availability, options, GEO grade, and description side-by-side.
  • This changelog! Public release notes at /changelog with a small version link in the footer.