MCP Rubber Duck

Name: MCP Rubber Duck
Author: nesquikm

nesquikm

Bridge to multiple OpenAI-compatible LLMs for rubber duck debugging: explain a problem to several models and compare their answers.

Setup

Choose your client, copy the config, then fill in any required environment variables.

Add to Cursor Add to VS Code

claude mcp add rubber-duck --env OPENAI_API_KEY='<OPENAI_API_KEY>' --env GEMINI_API_KEY='<GEMINI_API_KEY>' --env GROQ_API_KEY='<GROQ_API_KEY>' --env MCP_SERVER='<MCP_SERVER>' --env DEFAULT_PROVIDER='<DEFAULT_PROVIDER>' -- npx -y mcp-rubber-duck

~/.codex/config.toml

[mcp_servers.rubber-duck]
command = "npx"
args = ["-y", "mcp-rubber-duck"]
env = { OPENAI_API_KEY = "<OPENAI_API_KEY>", GEMINI_API_KEY = "<GEMINI_API_KEY>", GROQ_API_KEY = "<GROQ_API_KEY>", MCP_SERVER = "<MCP_SERVER>", DEFAULT_PROVIDER = "<DEFAULT_PROVIDER>" }

# codex mcp add rubber-duck --env OPENAI_API_KEY='<OPENAI_API_KEY>' --env GEMINI_API_KEY='<GEMINI_API_KEY>' --env GROQ_API_KEY='<GROQ_API_KEY>' --env MCP_SERVER='<MCP_SERVER>' --env DEFAULT_PROVIDER='<DEFAULT_PROVIDER>' -- npx -y mcp-rubber-duck

~/.cursor/mcp.json

{
  "mcpServers": {
    "rubber-duck": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-rubber-duck"
      ],
      "env": {
        "OPENAI_API_KEY": "<OPENAI_API_KEY>",
        "GEMINI_API_KEY": "<GEMINI_API_KEY>",
        "GROQ_API_KEY": "<GROQ_API_KEY>",
        "MCP_SERVER": "<MCP_SERVER>",
        "DEFAULT_PROVIDER": "<DEFAULT_PROVIDER>"
      }
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "rubber-duck": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mcp-rubber-duck"
      ],
      "env": {
        "OPENAI_API_KEY": "<OPENAI_API_KEY>",
        "GEMINI_API_KEY": "<GEMINI_API_KEY>",
        "GROQ_API_KEY": "<GROQ_API_KEY>",
        "MCP_SERVER": "<MCP_SERVER>",
        "DEFAULT_PROVIDER": "<DEFAULT_PROVIDER>"
      }
    }
  }
}

~/.gemini/settings.json

{
  "mcpServers": {
    "rubber-duck": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-rubber-duck"
      ],
      "env": {
        "OPENAI_API_KEY": "<OPENAI_API_KEY>",
        "GEMINI_API_KEY": "<GEMINI_API_KEY>",
        "GROQ_API_KEY": "<GROQ_API_KEY>",
        "MCP_SERVER": "<MCP_SERVER>",
        "DEFAULT_PROVIDER": "<DEFAULT_PROVIDER>"
      }
    }
  }
}

claude_desktop_config.json

{
  "mcpServers": {
    "rubber-duck": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-rubber-duck"
      ],
      "env": {
        "OPENAI_API_KEY": "<OPENAI_API_KEY>",
        "GEMINI_API_KEY": "<GEMINI_API_KEY>",
        "GROQ_API_KEY": "<GROQ_API_KEY>",
        "MCP_SERVER": "<MCP_SERVER>",
        "DEFAULT_PROVIDER": "<DEFAULT_PROVIDER>"
      }
    }
  }
}

.trae/mcp.json

{
  "mcpServers": {
    "rubber-duck": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-rubber-duck"
      ],
      "env": {
        "OPENAI_API_KEY": "<OPENAI_API_KEY>",
        "GEMINI_API_KEY": "<GEMINI_API_KEY>",
        "GROQ_API_KEY": "<GROQ_API_KEY>",
        "MCP_SERVER": "<MCP_SERVER>",
        "DEFAULT_PROVIDER": "<DEFAULT_PROVIDER>"
      }
    }
  }
}

Environment variables

OPENAI_API_KEY
GEMINI_API_KEY
GROQ_API_KEY
MCP_SERVER
DEFAULT_PROVIDER

Replace the placeholders with your own credentials and keep them out of version control.

Setup

Environment variables

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