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mcp-tool-builder

by hanweg
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Python
Local
The Unlicense
27

WORK IN PROGRESS - USE WITH CAUTION - Windows

MCP Tool Builder

An MCP server that empowers LLMs to dynamically create new tools through MCP clients such as Claude Desktop.

Features

  • Create new tools by describing them in natural language

    • Requires client restart to use new tools (Claude Desktop)

  • New tools are saved as python scriptlets in ...\mcp-tool-builder\tools

  • New tool definitions are saved in ...\mcp-tool-builder\tools\tools.json

Example tools included at installation

  • get_bitcoin_price: Fetches current Bitcoin price from CoinGecko

  • get_weather_forecast: Gets weather for US ZIP codes (uses geopy)

Creating New Tools

Use the create_tool command in Claude Desktop (or suggest strongly!!) to create new tools dynamically

Installation

  1. Clone this repository

  2. Install dependencies:

cd mcp-tool-builder uv venv .venv\Scripts\activate uv pip install -e .

Usage with Claude Desktop

Add to claude_desktop_config.json:

{ "mcpServers": { "tool-builder": { "command": "uv", "args": [ "--directory", "PATH_TO\\mcp-tool-builder", "run", "tool-builder" ] } } }

Screenshot 2024-12-24 105318

image

Deploy Server
A
security – no known vulnerabilities
A
license - permissive license
A
quality - confirmed to work

How are these scores calculated?

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