{"version":"2.1.274","anchor":"mcp-catalog-lookup-source-changed","canonical_anchor":"mcp-catalog-lookup-source-changed","heading":"MCP catalog lookup source changed","tier":"internal","area":"MCP","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.274\/e\/mcp-catalog-lookup-source-changed","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.274","markdown":"### MCP catalog lookup source changed\n\nMCP catalog lookups now read from a served catalog cache instead of a host-keyed source\n\n**Unclear.** What effect this source change has on behavior visible to the user is not specified.\n\n**What**\n\nThe internal function that looks up the MCP (Model Context Protocol) catalog now returns its data from a `servedCatalogByKey` source instead of the previous host-based lookup.\n\n**Why**\n\nThis changes where Claude Code's MCP catalog data comes from internally; the finding does not specify what practical difference this makes for users.\n\n- Area: MCP\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 1\/5"}