FreeCAD MCP Server

by blwfish Your server? Claim it

local only

FreeCAD MCP runs on your own machine — the client starts it, so there is no endpoint to ping. Last commit 16 Sep 2026.

Control FreeCAD from Claude — 3D modeling, PartDesign, CAM toolpaths, and more via 30+ tools.

—

Installs / week

not published

Stars

1 open issues

16 Sep 2026

Last commit

from GitHub

LGPL-2.1

License

Python

What the code does

We read the source, 50 min ago · rules 3dff92dd89df

A tool parameter reaches a dangerous call

A value the model can set ends up inside a file or shell call. That is not a flaw by itself — for a terminal server it is the job — but it is where things go wrong when it is not.

A tool parameter reaches a file or shell call execute_python.code → AICopilot/handlers/execute_python_ops.py:168, execute_python.code → AICopilot/handlers/execute_python_ops.py:87, restart_freecad.reopen_documents → AICopilot/handlers/diagnostics_ops.py:262 и ещё 1

                    result_value = eval(compile(expr_ast, "<string>", "eval"), namespace)

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Executes code built at runtime AICopilot/handlers/macro_ops.py:292, helpers/parametric_helpers.py:111, AICopilot/handlers/introspection_ops.py:147 и ещё 1

                exec(code_obj, namespace)

Builds a file path from a variable AICopilot/handlers/macro_ops.py:56, AICopilot/instance_registry.py:42

    candidate = os.path.join(macro_dir, name)

Runs an external command AICopilot/freecad_mcp_handler.py:234, freecad_mcp_server.py:764, AICopilot/handlers/diagnostics_ops.py:213

        result = subprocess.run(

Image runs as root Dockerfile:6

USER root

# Install FreeCAD via conda-forge (this is what the AppImages are built from).
# conda-forge's freecad package doesn't pull in pip as a dependency -- install
# it explicitly, since the next step needs it to install the MCP bridge deps.

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

A tool parameter here reaches a dangerous call

That is not a flaw by itself — but it is where things go wrong when it is not the job. We re-read this code on every release. Watch it and you hear from us the day another one appears.

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FreeCAD MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for FreeCAD MCP?

FreeCAD MCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone.

Is FreeCAD MCP open source?

Yes — it is published under the LGPL-2.1 licence, written in Python, 45 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.