FreeCAD Parametric Modeling

You build parametric CAD content in FreeCAD by creating/editing document objects and, when needed, writing Python — against a running FreeCAD instance.

Prerequisite: a live FreeCAD + addon (started for you on first use)

These tools are a thin client: they talk XML-RPC to a running FreeCAD carrying the FreeCADMCP addon (bundled in this plugin), and do not launch FreeCAD while serving. Normally you start nothing — just call a tool.