MCP server that builds itself by creating new tools as needed based on user requests (Requires restart of Claude Desktop to use newly created tools).
An MCP server that empowers LLMs to dynamically create new tools through MCP clients such as Claude Desktop.
Use the create_tool command in Claude Desktop (or suggest strongly!!) to create new tools dynamically
cd mcp-tool-builder
uv venv
.venvScriptsactivate
uv pip install -e .Add to claude_desktop_config.json:
{
"mcpServers": {
"tool-builder": {
"command": "uv",
"args": [
"--directory",
"PATH_TOmcp-tool-builder",
"run",
"tool-builder"
]
}
}
}[
{
"description": "Create a new Python tool with specified functionality",
"inputSchema": {
"properties": {
"code": {
"description": "Python code implementing the tool",
"type": "string"
},
"description": {
"description": "Description of what the tool should do",
"type": "string"
},
"tool_name": {
"description": "Name of the new tool",
"type": "string"
}
},
"required": [
"tool_name",
"description",
"code"
],
"type": "object"
},
"name": "create_tool"
},
{
"description": "List all currently available tools",
"inputSchema": {
"properties": {},
"required": [],
"type": "object"
},
"name": "list_available_tools"
},
{
"description": "Gets current Bitcoin price in USD from CoinGecko API",
"inputSchema": {
"properties": {},
"required": [],
"type": "object"
},
"name": "get_bitcoin_price"
},
{
"description": "Retrieves weather forecast for a given ZIP code using NWS API",
"inputSchema": {
"properties": {
"zip_code": {
"type": "string"
}
},
"required": [
"zip_code"
],
"type": "object"
},
"name": "get_weather_forecast"
}
]