Blender MCP server

This Python-based server connects Blender to Claude AI through the Model Context Protocol (MCP), enabling AI-assisted 3D modeling and scene creation. With BlenderMCP, Claude can directly control Blender to create objects, apply materials, and manipulate scenes based on natural language instructions.

Installation

Prerequisites

• Blender 3.0 or newer
• Python 3.10 or newer
• uv package manager

Install uv based on your operating system:

Mac:

brew install uv

Windows:

powershell -c "irm https://astral.sh/uv/install.ps1 | iex"
set Path=C:\Users\nntra\.local\bin;%Path%

For other systems, check the uv installation guide.

Claude for Desktop Integration

To configure Claude for Desktop:

1. Go to Claude > Settings > Developer > Edit Config > claude_desktop_config.json
2. Add the following configuration:

{
    "mcpServers": {
        "blender": {
            "command": "uvx",
            "args": [
                "blender-mcp"
            ]
        }
    }
}

Cursor Integration

Mac Users:

1. Go to Settings > MCP
2. Either use "add new global MCP server" button or create .cursor/mcp.json in your project root
3. Add the following configuration:

{
    "mcpServers": {
        "blender": {
            "command": "uvx",
            "args": [
                "blender-mcp"
            ]
        }
    }
}

Windows Users:

1. Go to Settings > MCP > Add Server
2. Add a new server with these settings:

{
    "mcpServers": {
        "blender": {
            "command": "cmd",
            "args": [
                "/c",
                "uvx",
                "blender-mcp"
            ]
        }
    }
}

⚠️ Important: Run only one instance of the MCP server (either on Cursor or Claude Desktop), not both.

Installing the Blender Addon

1. Download the addon.py file from the repository
2. Open Blender
3. Navigate to Edit > Preferences > Add-ons
4. Click "Install..." and select the addon.py file
5. Enable the addon by checking the box next to "Interface: Blender MCP"

Usage

Starting the Connection

1. In Blender, open the 3D View sidebar (press N if not visible)
2. Find the "BlenderMCP" tab
3. Toggle the Poly Haven checkbox if you want access to their assets (optional)
4. Click "Connect to Claude"

Using with Claude

Once connected, you'll see a hammer icon in Claude with tools for the Blender MCP. You can now ask Claude to:

• Get information about the scene or objects
• Create, delete, and modify 3D shapes
• Apply or create materials
• Execute Python code in Blender
• Download models, assets and HDRIs from Poly Haven
• Generate 3D models through Hyper3D Rodin
• Search and download models from Sketchfab

Example Commands

Here are some examples of what you can ask Claude to do:

• "Create a low poly scene in a dungeon, with a dragon guarding a pot of gold"
• "Create a beach vibe using HDRIs, textures, and models from Poly Haven"
• "Generate a 3D model of a garden gnome through Hyper3D"
• "Make this car red and metallic"
• "Create a sphere and place it above the cube"
• "Make the lighting like a studio"
• "Point the camera at the scene, and make it isometric"

Hyper3D Integration

Hyper3D's free trial key allows a limited number of model generations per day. When the limit is reached, you can wait for the next day's reset or obtain your own key from hyper3d.ai and fal.ai.

Troubleshooting

• Connection issues: Ensure the Blender addon server is running and the MCP server is properly configured in Claude. Do not run the uvx command manually in the terminal.
• Timeout errors: Try simplifying your requests or breaking them into smaller steps.
• Inconsistent behavior: If experiencing connection errors, try restarting both Claude and the Blender server.
• Poly Haven integration: Claude may sometimes be inconsistent with Poly Haven asset integration.

Technical Details

The system uses a JSON-based protocol over TCP sockets for communication:

• Commands are sent as JSON objects with a type and optional params
• Responses are JSON objects with a status and result or message

How to add this MCP server to Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > MCP and click "Add new global MCP server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "cursor-rules-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "cursor-rules-mcp"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explictly ask the agent to use the tool by mentioning the tool name and describing what the function does.