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Cursor letterhead doc_files

How to: Cursor letterhead doc_files

client:Cursor transport:streamable-http tool:doc_files

Add letterhead to Cursor

  1. 01

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

{
  "mcpServers": {
    "letterhead": {
      "url": "https://mcp.zovo.one/mcp/letterhead"
    }
  }
}
  1. 02

    Save the file and restart Cursor.

  2. 03

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

  3. 04

    If nothing happens, check the server is running and that letterhead'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

Set these first

letterhead will not start until these are set, so doc_files never becomes available.

  • MCP_LICENSE_KEY

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 24 September 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.