MCP Rubber Duck

An MCP server that bridges to multiple LLMs and CLI agents, enabling features like duck councils, debates, voting, and consensus building. It supports universal OpenAI compatibility, CLI coding agents, conversation management, and structured debates.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by nesquikm

Vendor documentation

What you can do with it

Query multiple LLMs simultaneously for diverse perspectives
Conduct structured debates (Oxford, Socratic) between AI agents
Perform multi-duck voting with reasoning and confidence scores
Use CLI coding agents like Claude Code or Codex as 'ducks'

Source and maintenance

Community listingRegistry 1.18.0

mcp-registry: io.github.nesquikm/rubber-duck@1.18.0 Source repository

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

mcp-rubber-duck 1.18.0

npm

mcp-rubber-duck package definition

{
  "version": "1.18.0",
  "transport": "stdio",
  "identifier": "mcp-rubber-duck",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "OPENAI_API_KEY",
      "format": "string",
      "description": "OpenAI API key (starts with sk-)"
    },
    {
      "name": "GEMINI_API_KEY",
      "format": "string",
      "description": "Google Gemini API key"
    },
    {
      "name": "GROQ_API_KEY",
      "format": "string",
      "description": "Groq API key (starts with gsk_)"
    },
    {
      "name": "DEFAULT_PROVIDER",
      "format": "string",
      "description": "Default LLM provider to use"
    }
  ]
}

Tools

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No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

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Cursor configuration

{
  "mcpServers": {
    "mcp-rubber-duck": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-rubber-duck@1.18.0"
      ],
      "env": {
        "OPENAI_API_KEY": "<YOUR_OPENAI_API_KEY>",
        "GEMINI_API_KEY": "<YOUR_GEMINI_API_KEY>",
        "GROQ_API_KEY": "<YOUR_GROQ_API_KEY>",
        "DEFAULT_PROVIDER": "<YOUR_DEFAULT_PROVIDER>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "mcp-rubber-duck": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-rubber-duck@1.18.0"
      ],
      "env": {
        "OPENAI_API_KEY": "<YOUR_OPENAI_API_KEY>",
        "GEMINI_API_KEY": "<YOUR_GEMINI_API_KEY>",
        "GROQ_API_KEY": "<YOUR_GROQ_API_KEY>",
        "DEFAULT_PROVIDER": "<YOUR_DEFAULT_PROVIDER>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "mcp-rubber-duck": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mcp-rubber-duck@1.18.0"
      ],
      "env": {
        "OPENAI_API_KEY": "<YOUR_OPENAI_API_KEY>",
        "GEMINI_API_KEY": "<YOUR_GEMINI_API_KEY>",
        "GROQ_API_KEY": "<YOUR_GROQ_API_KEY>",
        "DEFAULT_PROVIDER": "<YOUR_DEFAULT_PROVIDER>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "mcp-rubber-duck": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-rubber-duck@1.18.0"
      ],
      "env": {
        "OPENAI_API_KEY": "<YOUR_OPENAI_API_KEY>",
        "GEMINI_API_KEY": "<YOUR_GEMINI_API_KEY>",
        "GROQ_API_KEY": "<YOUR_GROQ_API_KEY>",
        "DEFAULT_PROVIDER": "<YOUR_DEFAULT_PROVIDER>"
      }
    }
  }
}

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