- Added optional UCP location search and lookup capabilities (dev.ucp.common.location.search & dev.ucp.common.location.lookup) for storefronts with retail locations, advertised in /.well-known/ucp.
- Introduced MCP endpoint tools: search_locations (supports name, city, distance, item filters, pagination up to 250) and lookup_locations (batch up to 10 IDs) returning location details.
- Agents must declare these capabilities at UCP version 2026-08-25, call them only when advertised, provide buyer‑shared distance.center, and treat item matches as provisional pending checkout confirmation.