Autodesk Fusion 360 MCP Server

Fusion MCP Integration

https://github.com/user-attachments/assets/46c8140e-377d-4618-a304-03861cb3d7d9

🎯 About

Fusion MCP Integration bridges AI assistants with Autodesk Fusion 360 through the Model Context Protocol (MCP). This enables:

• ✨ Conversational CAD - Create 3D models using natural language
• 🤖 AI-Driven Automation - Automate repetitive modeling tasks
• 🔧 Parametric Control - Dynamically modify design parameters
• 🎓 Accessible CAD - Lower the barrier for non-CAD users

> Note: This is designed as an assistive tool and educational project, not a replacement for professional CAD workflows. > Projects like this can assist people with no experience in CAD workflows.

> Goal: Enable conversational CAD and AI-driven automation in Fusion.

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Setup

I highly recommend to do everything inside Visual Studio Code or an other IDE

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Requirements

| Requirement | Link | |------------|------| | Python 3.10+ | https://python.org | | Autodesk Fusion 360 | https://autodesk.com/fusion360 | | Claude Desktop | https://claude.ai/download | | VS Code | https://code.visualstudio.com |

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Clone Repository

git clone https://github.com/JustusBraitinger/FusionMCP

> Important: Do NOT start the Add-In yet.

Install Python Dependencies

cd Server
python -m venv venv

Activate venv

Windows PowerShell

.\venv\Scripts\Activate

Install packages

pip install -r requirements.txt
pip install "mcp[cli]"

Installing the MCP Add-In for Fusion 360

cd ..
python Install_Addin.py

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Connect to Claude

The most simple way to add the MCP-Server to Claude Desktop is to run following command:

cd Server
uv run mcp install MCP_Server.py

The output should be like this:

[11/13/25 08:42:37] INFO     Added server 'Fusion' to Claude config
                    INFO     Successfully installed Fusion in Claude app                                                                                                                                                               

Alternative

Modify Claude Config

In Claude Desktop go to: Settings → Developer → Edit Config

Add this block (change the path for your system):

{
  "mcpServers": {
    "FusionMCP": {
      "command": "uv",
      "args": [
        "--directory",
        "C:\\Path\\to\\FusionMCP\\Server",
        "run",
        "MCP_Server.py"
      ]
    }
  }
}

> Note: Windows paths require double backslashes \\

Using the MCP in Claude

1. Restart Claude if needed (force close if not visible)
2. Click ➕ Add (bottom left of chat)
3. Select Add from Fusion
4. Choose a Fusion MCP prompt

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Use MCP in VS Code (Copilot)

Create or edit the file:

%APPDATA%\Code\User\globalStorage\github.copilot-chat\mcp.json

Paste:

{
  "servers": {
    "FusionMCP": {
      "url": "http://127.0.0.1:8000/sse",
      "type": "http"
    }
  },
  "inputs": []
}

Alternative Setup in VS Code

1. Press CTRL + SHIFT + P → search MCP → choose:
2. Add MCP
3. HTTP
4. Enter:
5. Name your MCP FusionMCP!!

http://127.0.0.1:8000/sse

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Try It Out 😄

Activate the Fusion Addin inside Fusion

Configured in VS-Code:

Start the server:

python MCP_Server.py

Then type

/mcp.FusionMCP

Now you will see a list of predetermined Prompts.

Configured in Claude

Just open Claude, an ask for the FusionMCP

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🛠️ Available Tools

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✏️ Sketching & Creation Tools

| Tool | Description | | :--- | :--- | | Draw 2D circle | Draws a 2D circle at a specified position and plane. | | Ellipsie | Generates an ellipse (elliptical curve) in the sketching plane. | | Draw lines | Creates a polyline (multiple connected lines) as a sketch. | | Draw one line | Draws a single line between two 3D points. | | 3-Point Arc | Draws a circular arc based on three defined points. | | Spline | Draws a Spline curve through a list of 3D points (used for sweep path). | | Draw box | Creates a box (solid body) with definable dimensions and position. | | Draw cylinder | Draws a cylinder (solid body). | | Draw text| Draws a text and extrudes it with given values | | Draw Witzenmann logo | A fun demo function for creating the Witzenmann logo. |

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⚙️ Feature & Modification Tools

| Tool | Description | | :--- | :--- | | Extrude | Extrudes the last active sketch by a given value to create a body. | | Revolve | Creates a revolved body by revolving a profile around an axis. | | Sweep | Executes a sweep feature using the previously created profile and spline path. | | Loft | Creates a complex body by lofting between a defined number of previously created sketches. | | Thin extrusion | Creates a thin-walled extrusion (extrusion with constant wall thickness). | | Cut extrude | Removes material from a body by cutting a sketch (as a hole/pocket). | | Draw holes | Creates Counterbore holes at specified points on a surface (faceindex). | | Fillet edges | Rounds sharp edges with a defined radius (fillet). | | Shell body | Hollows out the body, leaving a uniform wall thickness. | | Circular pattern | Creates a circular pattern (array) of features or bodies around an axis. | | Rectangular pattern| Creates a rectangular pattern of a body|

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📏 Analysis & Control

| Tool | Description | | :--- | :--- | | Count | Counts the total number of all model parameters. | | List parameters | Lists all defined model parameters in detail. | | Change parameter | Changes the value of an existing named parameter in the model. | | Test connection | Tests the communication link to the Fusion 360 server. | | Undo | Undoes the last operation in Fusion 360. | | Delete all | Deletes all objects in the current Fusion 360 session (destroy). |

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💾 Export

| Tool | Description | | :--- | :--- | | Export STEP | Exports the model as a STEP file. | | Export STL | Exports the model as an STL file. |

Architecture

Server.py

• Defines MCP server, tools, and prompts
• Handles HTTP calls to Fusion add-in

MCP.py

• Fusion Add-in
• Because the Fusion API is not thread-safe, this uses:
• Custom event handler
• Task queue

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Why This Architecture?

The Fusion 360 API is not thread-safe and requires all operations to run on the main UI thread. Our solution:

1. Event-Driven Design - Use Fusion's CustomEvent system
2. Task Queue - Queue operations for sequential execution
3. Async Bridge - HTTP server handles async MCP requests

Security Considerations 🔒

• Local execution → safe by default
• Currently HTTP (OK locally, insecure on networks)
• Validate tool inputs to avoid prompt injection
• Real security depends on tool implementation

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This is NOT

• ❌ A production-ready tool
• ❌ A replacement for professional CAD software
• ❌ Suitable for critical engineering work
• ❌ Officially supported by Autodesk

This IS

• ✅ A proof-of-concept
• ✅ An educational project
• ✅ A demonstration of MCP capabilities
• ✅ A tool for rapid prototyping and learning

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This is a proof-of-concept, not production software.

Note #

This Fusion MCP implementation uses hard coded Tools, instead of trusting on the training of the LLM's. I chose this, because I wanted to test how far I can come

Contact

justus@braitinger.org

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: JustusBraitinger
• Source: JustusBraitinger/Autodesk-Fusion-360-MCP-Server
• License: MIT

Install and usage instructions live in the source repository linked above.