Rubber Duck MCP Server

A Model Context Protocol (MCP) server that provides a rubber duck debugging tool for LLMs. This server allows LLMs to explain their code to a "rubber duck" without expecting any response, helping…

Local serverstdio

What is the Rubber Duck MCP Server?

Rubber Duck MCP Server is an MCP project maintained in the francoisjosephlacroix/rubber-duck-mcp repository. The maintainer describes its purpose as “A Model Context Protocol (MCP) server that provides a rubber duck debugging tool for LLMs. This server allows LLMs to explain their code to a…”. Read the project documentation for the complete scope.

Local setup

The project provides a local client configuration using uv. Follow the repository’s build and installation steps before copying it, and replace example paths with the paths on your own computer.

Source

Project documentation · Repository · Discovery listing. This profile records the public documentation checked on 2026-10-08.

How to install the Rubber Duck MCP Server

{
  "mcpServers": {
    "rubber-duck": {
      "command": "uv",
      "args": [
        "run",
        "--with",
        "fastmcp",
        "fastmcp",
        "run",
        "<project root>/src/server.py"
      ]
    }
  }
}

From the project documentation. Replace placeholders and example paths before connecting.