How do I connect MCP Rubber Duck MCP Server to Claude?

Run `claude mcp add mcp-rubber-duck -- npx -y mcp-rubber-duck` in Claude Code, or add the same command and arguments under mcpServers in Cursor's mcp.json or Claude Desktop's claude_desktop_config.json, then restart the client. The blocks above are ready to paste.

Is MCP Rubber Duck MCP Server free?

The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.

What can MCP Rubber Duck MCP Server do?

MCP Rubber Duck MCP Server documents 15 tools to the agent, including approve_mcp_request, ask_duck, chat_with_duck. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.

MCP Rubber Duck

Unclaimed

by nesquikm

An MCP server that acts as a bridge to query multiple OpenAI-compatible LLMs with MCP tool access. Just like rubber duck debugging, explain your problems to various AI "ducks" who can actually research and get different perspectives!

Set up this server

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01 / Choose your client

02 / Before you connect

Authentication is not specified. Check the project instructions before connecting.

Install the runtime required by the project and make it available to your client.

Project instructionsEnvironment variable names (optional)

Use names from the project instructions, separated by commas. Enter names only, never secret values.

03 / Add the configuration

Source: generated from public install instructions

claude mcp add --transport stdio 'mcp-rubber-duck' -- 'npx' '-y' 'mcp-rubber-duck'

Run in your terminal after replacing any placeholders.

04 / Check it in your client

Open your client’s MCP settings and confirm the server connects and lists its tools. A copied configuration does not confirm a working connection.

Is this your MCP server?

This listing was auto-indexed from the public record. Claim it to edit the page, set compatibility and unlock growth tools. Takes under two minutes.

Claim this server

Security profile

Claimed and verified servers get a weekly static scan that shows what the code can reach: external services, environment variables, shell commands, agent configuration folders, plus any dependencies with known advisories. Claim this listing to get one. How the security profile works

15 of 15 tools

Documented tools (15)

From project documentation. A server handshake does not verify each tool’s description or behavior.

approve_mcp_request

Approve or deny a duck's MCP tool request

ask_duck

Ask a single question to a specific LLM provider

chat_with_duck

Conversation with context maintained across messages

clear_conversations

Clear all conversation history

compare_ducks

Ask the same question to multiple providers simultaneously

duck_council

Get responses from all configured ducks

duck_debate

Structured multi-round debate between ducks

duck_iterate

Iteratively refine a response between two ducks

duck_judge

Have one duck evaluate and rank others' responses

duck_vote

Multi-duck voting with reasoning and confidence

get_pending_approvals

Pending MCP tool approval requests

get_usage_stats

Usage statistics and estimated costs

list_ducks

List configured providers and health status

list_models

List available models for providers

mcp_status

MCP Bridge status and connected servers

Tool change history

Compared across complete checks of the same configuration. Tools were listed, not invoked. Input-schema changes are not measured here.

No complete tool checks yet.

FAQ

Questions about MCP Rubber Duck MCP Server

How do I connect MCP Rubber Duck MCP Server to Claude?: Run `claude mcp add mcp-rubber-duck -- npx -y mcp-rubber-duck` in Claude Code, or add the same command and arguments under mcpServers in Cursor's mcp.json or Claude Desktop's claude_desktop_config.json, then restart the client. The blocks above are ready to paste.
Is MCP Rubber Duck MCP Server free?: The listed licence is MIT. Check the upstream terms for permitted use and commercial requirements; a public repository does not by itself mean the software is free or open source. Connected APIs and hosted services may have separate charges.
What can MCP Rubber Duck MCP Server do?: MCP Rubber Duck MCP Server documents 15 tools to the agent, including approve_mcp_request, ask_duck, chat_with_duck. The descriptions above come from project documentation. A live handshake does not test individual tool behavior.