Provides tools to control FreeCAD, enabling AI agents to create and edit 3D models, manage documents, objects, and parts library, and execute Python code within FreeCAD.
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@FreeCAD MCP make a sphere with radius 25mm"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
This repository is a FreeCAD MCP that allows you to control FreeCAD from Claude Desktop.
This is the conversation history. https://claude.ai/share/7b48fd60-68ba-46fb-bb21-2fbb17399b48
Related MCP server: FreeCAD MCP
FreeCAD Addon directory is
Windows: %APPDATA%\FreeCAD\Mod\
Mac: ~/Library/Application\ Support/FreeCAD/Mod/
Linux:
Ubuntu: ~/.FreeCAD/Mod/ or ~/snap/freecad/common/Mod/ (if you install FreeCAD from snap)
Debian: ~/.local/share/FreeCAD/Mod
Please put addon/FreeCADMCP directory to the addon directory.
git clone https://github.com/neka-nat/freecad-mcp.git
cd freecad-mcp
cp -r addon/FreeCADMCP ~/.FreeCAD/Mod/When you install addon, you need to restart FreeCAD. You can select "MCP Addon" from Workbench list and use it.
And you can start RPC server by "Start RPC Server" command in "FreeCAD MCP" toolbar.
Pre-installation of the uvx is required.
And you need to edit Claude Desktop config file, claude_desktop_config.json.
For user.
{
"mcpServers": {
"freecad": {
"command": "uvx",
"args": [
"freecad-mcp"
]
}
}
}If you want to save token, you can set only_text_feedback to true and use only text feedback.
{
"mcpServers": {
"freecad": {
"command": "uvx",
"args": [
"freecad-mcp",
"--only-text-feedback"
]
}
}
}For developer. First, you need clone this repository.
git clone https://github.com/neka-nat/freecad-mcp.git{
"mcpServers": {
"freecad": {
"command": "uv",
"args": [
"--directory",
"/path/to/freecad-mcp/",
"run",
"freecad-mcp"
]
}
}
}create_document: Create a new document in FreeCAD.
create_object: Create a new object in FreeCAD.
edit_object: Edit an object in FreeCAD.
delete_object: Delete an object in FreeCAD.
execute_code: Execute arbitrary Python code in FreeCAD.
insert_part_from_library: Insert a part from the parts library.
get_view: Get a screenshot of the active view.
get_objects: Get all objects in a document.
get_object: Get an object in a document.
get_parts_list: Get the list of parts in the parts library.
Made with contrib.rocks.
Create a new document in FreeCAD.
Args:
name: The name of the document to create.
Returns:
A message indicating the success or failure of the document creation.
Examples:
If you want to create a document named "MyDocument", you can use the following data.
```json
{
"name": "MyDocument"
}
```
Inputs: name (required). Returns: result
Create a new object in FreeCAD. Object type is starts with "Part::" or "Draft::" or "PartDesign::" or "Fem::".
Args:
doc_name: The name of the document to create the object in.
obj_type: The type of the object to create (e.g. 'Part::Box', 'Part::Cylinder', 'Draft::Circle', 'PartDesign::Body', etc.).
obj_name: The name of the object to create.
obj_properties: The properties of the object to create.
Returns:
A message indicating the success or failure of the object creation and a screenshot of the object.
Examples:
If you want to create a cylinder with a height of 30 and a radius of 10, you can use the following data.
```json
{
"doc_name": "MyCylinder",
"obj_name": "Cylinder",
"obj_type": "Part::Cylinder",
"obj_properties": {
"Height": 30,
"Radius": 10,
"Placement": {
"Base": {
"x": 10,
"y": 10,
"z": 0
},
"Rotation": {
"Axis": {
"x": 0,
"y": 0,
"z": 1
},
"Angle": 45
}
},
"ViewObject": {
"ShapeColor": [0.5, 0.5, 0.5, 1.0]
}
}
}
```
If you want to create a circle with a radius of 10, you can use the following data.
```json
{
"doc_name": "MyCircle",
"obj_name": "Circle",
"obj_type": "Draft::Circle",
}
```
If you want to create a FEM analysis, you can use the following data.
```json
{
"doc_name": "MyFEMAnalysis",
"obj_name": "FemAnalysis",
"obj_type": "Fem::AnalysisPython",
}
```
If you want to create a FEM constraint, you can use the following data.
```json
{
"doc_name": "MyFEMConstraint",
"obj_name": "FemConstraint",
"obj_type": "Fem::ConstraintFixed",
"analysis_name": "MyFEMAnalysis",
"obj_properties": {
"References": [
{
"object_name": "MyObject",
"face": "Face1"
}
]
}
}
```
If you want to create a FEM mechanical material, you can use the following data.
```json
{
"doc_name": "MyFEMAnalysis",
"obj_name": "FemMechanicalMaterial",
"obj_type": "Fem::MaterialCommon",
"analysis_name": "MyFEMAnalysis",
"obj_properties": {
"Material": {
"Name": "MyMaterial",
"Density": "7900 kg/m^3",
"YoungModulus": "210 GPa",
"PoissonRatio": 0.3
}
}
}
```
If you want to create a FEM mesh, you can use the following data.
The `Part` property is required.
```json
{
"doc_name": "MyFEMMesh",
"obj_name": "FemMesh",
"obj_type": "Fem::FemMeshGmsh",
"analysis_name": "MyFEMAnalysis",
"obj_properties": {
"Part": "MyObject",
"ElementSizeMax": 10,
"ElementSizeMin": 0.1,
"MeshAlgorithm": 2
}
}
```
Inputs: doc_name (required), obj_type (required), obj_name (required), analysis_name, +1 more. Returns: result
Delete an object in FreeCAD.
Args:
doc_name: The name of the document to delete the object from.
obj_name: The name of the object to delete.
Returns:
A message indicating the success or failure of the object deletion and a screenshot of the object.
Inputs: doc_name (required), obj_name (required). Returns: result
Edit an object in FreeCAD.
This tool is used when the create_object tool cannot handle the object creation.
Args:
doc_name: The name of the document to edit the object in.
obj_name: The name of the object to edit.
obj_properties: The properties of the object to edit.
Returns:
A message indicating the success or failure of the object editing and a screenshot of the object.
Inputs: doc_name (required), obj_name (required), obj_properties (required). Returns: result
Execute arbitrary Python code in FreeCAD.
Args:
code: The Python code to execute.
Returns:
A message indicating the success or failure of the code execution, the output of the code execution, and a screenshot of the object.
Inputs: code (required). Returns: result
Get an object from a document. You can use this tool to get the properties of an object to see what you can check or edit.
Args:
doc_name: The name of the document to get the object from.
obj_name: The name of the object to get.
Returns:
The object and a screenshot of the object.
Inputs: doc_name (required), obj_name (required). Returns: object
Get all objects in a document. You can use this tool to get the objects in a document to see what you can check or edit.
Args:
doc_name: The name of the document to get the objects from.
Returns:
A list of objects in the document and a screenshot of the document.
Inputs: doc_name (required). Returns: result
Get the list of parts in the parts library addon.
Inputs: no named parameters. Returns: result
Get a screenshot of the active view.
Args:
view_name: The name of the view to get the screenshot of.
The following views are available:
- "Isometric"
- "Front"
- "Top"
- "Right"
- "Back"
- "Left"
- "Bottom"
- "Dimetric"
- "Trimetric"
Returns:
A screenshot of the active view.
Inputs: view_name (required). Returns: result
Insert a part from the parts library addon.
Args:
relative_path: The relative path of the part to insert.
Returns:
A message indicating the success or failure of the part insertion and a screenshot of the object.
Inputs: relative_path (required). Returns: result
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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Scored across 10 tools
Most tools have clearly distinct purposes, but edit_object's description confusingly states it is used when create_object cannot handle creation, blurring the boundary between creation and editing. Otherwise tools are well-separated.
All tools follow a consistent snake_case verb_noun pattern (e.g., create_document, get_objects, delete_object), making the set predictable and easy to navigate.
With 10 tools, the server is well-scoped for a CAD assistant, covering essential operations without overwhelming the user. The count matches the domain well.
Core workflows (document and object lifecycle, code execution, viewing) are covered, but some gaps exist like saving/exporting documents or sketch constraints. However, execute_code can extend functionality.
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