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Cursor WarmInboxes Free MCP: Fleet Planner lookup_mx

How to: Cursor WarmInboxes Free MCP: Fleet Planner lookup_mx

client:Cursor transport:streamable-http tool:lookup_mx

Add WarmInboxes Free MCP: Fleet Planner to Cursor

  1. 01

    Open ~/.cursor/mcp.json and merge this in. Keep any servers already there.

{
  "mcpServers": {
    "fleet-planner": {
      "url": "https://warminboxes.com/mcp/planner"
    }
  }
}
  1. 02

    Save the file and restart Cursor.

  2. 03

    Ask for something lookup_mx does. Cursor lists the server's tools on connect and calls lookup_mx itself — you do not invoke it by name.

  3. 04

    If nothing happens, check the server is running and that WarmInboxes Free MCP: Fleet Planner's identifier in your config matches the one above exactly.

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 11 November 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.