# Freecad Mcp > FreeCAD MCP(Model Context Protocol) server - **Type:** MCP server - **Install:** `agentstack add mcp-neka-nat-freecad-mcp` - **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior - **Seller:** [neka-nat](https://agentstack.voostack.com/s/neka-nat) - **Installs:** 0 - **Category:** [Integrations](https://agentstack.voostack.com/c/integrations) - **Latest version:** 0.1.0 - **License:** MIT - **Upstream author:** [neka-nat](https://github.com/neka-nat) - **Source:** https://github.com/neka-nat/freecad-mcp ## Install ```sh agentstack add mcp-neka-nat-freecad-mcp ``` Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent. ## About [](https://mseep.ai/app/neka-nat-freecad-mcp) # FreeCAD MCP This repository is a FreeCAD MCP that allows you to control FreeCAD from Claude Desktop. ## Demo ### Design a flange ### Design a toy car ### Design a part from 2D drawing #### Input 2D drawing #### Demo This is the conversation history. https://claude.ai/share/7b48fd60-68ba-46fb-bb21-2fbb17399b48 ## Install addon FreeCAD Addon directory is * Windows: `%APPDATA%\FreeCAD\Mod\` * Mac: * FreeCAD 1.1: `~/Library/Application\ Support/FreeCAD/v1-1/Mod/` * FreeCAD 1.0: `~/Library/Application\ Support/FreeCAD/v1-0/Mod/` * Linux: * Ubuntu: `~/.FreeCAD/Mod/` or `~/snap/freecad/common/Mod/` (if you install FreeCAD from snap) * Debian: `~/.local/share/FreeCAD/Mod` * Arch / CachyOS (FreeCAD 1.1 from `extra/freecad`): `~/.local/share/FreeCAD/v1-1/Mod/` Please put `addon/FreeCADMCP` directory to the addon directory. ```bash git clone https://github.com/neka-nat/freecad-mcp.git cd freecad-mcp # For Linux (Ubuntu/Debian) cp -r addon/FreeCADMCP ~/.FreeCAD/Mod/ # For Linux (Arch/CachyOS, FreeCAD 1.1 from extra/freecad) mkdir -p ~/.local/share/FreeCAD/v1-1/Mod/ cp -r addon/FreeCADMCP ~/.local/share/FreeCAD/v1-1/Mod/ # For macOS (FreeCAD 1.1) cp -r addon/FreeCADMCP ~/Library/Application\ Support/FreeCAD/v1-1/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. ### Auto-Start RPC Server By default, the RPC server must be started manually each time FreeCAD opens. To start it automatically: 1. Open the **FreeCAD MCP** menu (switch to the MCP Addon workbench first) 2. Check **Auto-Start Server** The setting is saved to `freecad_mcp_settings.json` and persists across sessions. On the next FreeCAD launch, the RPC server will start automatically once the application finishes loading. You can disable it at any time by unchecking **Auto-Start Server** in the same menu. ## Setting up Claude Desktop Pre-installation of the [uvx](https://docs.astral.sh/uv/guides/tools/) is required. And you need to edit Claude Desktop config file, `claude_desktop_config.json`. For user. ```json { "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. ```json { "mcpServers": { "freecad": { "command": "uvx", "args": [ "freecad-mcp", "--only-text-feedback" ] } } } ``` For developer. First, you need clone this repository. ```bash git clone https://github.com/neka-nat/freecad-mcp.git ``` ```json { "mcpServers": { "freecad": { "command": "uv", "args": [ "--directory", "/path/to/freecad-mcp/", "run", "freecad-mcp" ] } } } ``` ## Remote Connections By default the RPC server does not accept remote connections and listens on `localhost`. To control FreeCAD from another machine on your network: ### 1. Enable remote connections in FreeCAD In the **FreeCAD MCP** toolbar: 1. Check **Remote Connections** — the RPC server will bind to `0.0.0.0` (all interfaces) on the next restart. For security reasons, it only accepts connections from the IP addresses or CIDR subnets specified in the **Allowed IPs** field. By default this is `127.0.0.1`. 2. Click **Configure Allowed IPs** and enter a comma-separated list of IP addresses or CIDR subnets that are allowed to connect, e.g.: ``` 192.168.1.100, 10.0.0.0/24 ``` `127.0.0.1` is always the default. Invalid entries are rejected with an error dialog. Restart the RPC server after changing these settings. ### 2. Point the MCP server at the remote host Pass the `--host` flag with the IP address or hostname of the machine running FreeCAD: ```json { "mcpServers": { "freecad": { "command": "uvx", "args": [ "freecad-mcp", "--host", "192.168.1.100" ] } } } ``` The `--host` value is validated on startup — it must be a valid IPv4/IPv6 address or hostname. ## Tools * `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](https://github.com/FreeCAD/FreeCAD-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](https://github.com/FreeCAD/FreeCAD-library). * `run_fem_analysis`: Run the CalculiX solver on an existing `Fem::FemAnalysis` and return summary results (max von Mises stress, max displacement, node count, working directory). Auto-creates a `SolverCcxTools` if the analysis has none. See [`examples/cantilever_fem.py`](examples/cantilever_fem.py) for an end-to-end usage example. ## Contributors Made with [contrib.rocks](https://contrib.rocks). ## Source & license This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code. - **Author:** [neka-nat](https://github.com/neka-nat) - **Source:** [neka-nat/freecad-mcp](https://github.com/neka-nat/freecad-mcp) - **License:** MIT Install and usage instructions live in the source repository linked above. ## Pricing - **Free** — Free ## Security capabilities Automated source analysis of v0.1.0 — what this tool can access: - **Network access:** no - **Filesystem access:** no - **Shell / process execution:** no - **Environment & secrets:** no - **Dynamic code execution:** no *"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.* ## Versions - **0.1.0** — security scan: passed — Imported from the upstream source. ## Links - Listing page: https://agentstack.voostack.com/l/mcp-neka-nat-freecad-mcp - Seller: https://agentstack.voostack.com/s/neka-nat - Browse the marketplace: https://agentstack.voostack.com/browse --- Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.