letin: Power Query (M) MCP Server

What the code does

We read the source, 46 min ago · rules 3dff92dd89df

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

            proc = subprocess.run([str(powershell), "-NoProfile", "-NonInteractive", "-EncodedCommand", encoded], stdin=subprocess.DEVNULL,

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add letin -- uvx letin

{
  "mcpServers": {
    "letin": {
      "args": [
        "letin"
      ],
      "command": "uvx"
    }
  }
}

[mcp_servers.letin]
command = "uvx"
args = ["letin"]

{
  "mcpServers": {
    "letin": {
      "args": [
        "letin"
      ],
      "command": "uvx"
    }
  }
}

{
  "mcpServers": {
    "letin": {
      "args": [
        "letin"
      ],
      "command": "uvx"
    }
  }
}

This one needs environment variables set before it will start: LETIN_HOME (Folder for query snapshots. Defaults to %LOCALAPPDATA%\letin.). The author declared them in the registry entry; get the values from the project itself.