WORK IN PROGRESS - USE WITH CAUTION - Windows

MCP server that creates its own tools as needed

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Overview

MCP Tool Builder is a server that allows large language models (LLMs) to dynamically create new tools as needed through MCP clients like Claude Desktop.

To use MCP Tool Builder, clone the repository, install the dependencies, and configure it with Claude Desktop to create and manage tools dynamically.

Create new tools by describing them in natural language. - New tools are saved as Python scriptlets. - Tool definitions are stored in a JSON file for easy management.

Dynamically generating tools for specific tasks based on user input.
Fetching real-time data like Bitcoin prices or weather forecasts.
Enhancing LLM capabilities by allowing them to create custom tools on-the-fly.

Add to your AI client

Use these steps to connect WORK IN PROGRESS - USE WITH CAUTION - Windows in Cursor, Claude, VS Code, and other MCP-compatible apps. The same JSON appears in the Use with menu above for one-click copy.

Cursor

Add this to your .cursor/mcp.json file in your project root, then restart Cursor.

.cursor/mcp.json

{
  "mcpServers": {
    "mcp-tool-builder-hanweg": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-tool-builder-hanweg"
      ]
    }
  }
}

Claude Desktop

Add this server entry to the mcpServers object in your Claude Desktop config, then restart the app.

~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

{
  "mcpServers": {
    "mcp-tool-builder-hanweg": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-tool-builder-hanweg"
      ]
    }
  }
}

Claude Code

Add this to your project's .mcp.json file. Claude Code will detect it automatically.

.mcp.json (project root)

{
  "mcpServers": {
    "mcp-tool-builder-hanweg": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-tool-builder-hanweg"
      ]
    }
  }
}

VS Code (Copilot)

Add this to your .vscode/mcp.json file. Requires the GitHub Copilot extension with MCP support enabled.

.vscode/mcp.json

{
  "servers": {
    "mcp-tool-builder-hanweg": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-tool-builder-hanweg"
      ]
    }
  }
}

Windsurf

Add this to your Windsurf MCP config file, then restart Windsurf.

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "mcp-tool-builder-hanweg": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-tool-builder-hanweg"
      ]
    }
  }
}

Cline

Open Cline settings, navigate to MCP Servers, and add this server configuration.

Cline MCP Settings (via UI)

{
  "mcpServers": {
    "mcp-tool-builder-hanweg": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-tool-builder-hanweg"
      ]
    }
  }
}

FAQ

Can I create any tool with MCP Tool Builder?

Yes! You can create tools by describing them in natural language, and they will be generated accordingly.

Is there a limit to the number of tools I can create?

No, you can create as many tools as needed, but each new tool requires a client restart to be used.

How do I install MCP Tool Builder?

Clone the repository, install the dependencies, and configure it with your MCP client.

Developer tools