{"version":"2.1.248","anchor":"mcp-json-can-mark-the-coordinator-s-user-facing-server","canonical_anchor":"mcp-json-can-mark-the-coordinator-s-user-facing-server","heading":".mcp.json can mark the coordinator's user-facing server","tier":"use","area":"MCP","scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.248\/e\/mcp-json-can-mark-the-coordinator-s-user-facing-server","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.248","markdown":"### `.mcp.json` can mark the coordinator's user-facing server\n\nYou can mark one MCP server in .mcp.json as the coordinator's user-facing server.\n\n**What**\n\nMCP server config accepts an optional role field marking the server the coordinator uses to talk to the user, and the coordinator's tool filter lets that server's tools through. It is a Claude Code extension to `.mcp.json`, applied only on your machine, and only takes effect when coordinator mode is on via `CLAUDE_CODE_COORDINATOR_MODE`.\n\n**Evidence**\n\n`Coordinator mode is activated via the CLAUDE_CODE_COORDINATOR_MODE environment variable; this field only takes effect when coordinator mode is active.`\n\n- Area: MCP\n- Names: `.mcp.json`, `CLAUDE_CODE_COORDINATOR_MODE`\n- Tier: Use it now\n- Useful: 3\/5\n- Signal: 4\/5"}