RhinoMCP connects Rhino to Claude AI through the Model Context Protocol (MCP), allowing Claude to directly interact with and control Rhino. This integration enables prompt assisted 3D modeling in Rhino 3D.

This demo shows how to ask AI to create custom scripts and execute them in Rhino. Click the image below to watch the video.

This demo shows how AI can interact with Rhino in two directions. Click the image below to watch the video.

• Two-way communication: Connect Claude AI to Rhino through a socket-based server
• Object manipulation: Create, modify, and delete 3D objects in Rhino
• Document inspection: Get detailed information about the current Rhino document
• Script execution: Execute Rhinos python scripts in Rhino (experimental, may not work every time)

The system consists of two main components:

1. MCP Server (src/rhino_mcp/server.py): A Python server that implements the Model Context Protocol and connects to the Rhino plugin
2. Rhino Plugin (src/rhino_mcp_plugin): A Rhino plugin that creates a socket server within Rhino to receive and execute commands

• Rhino 7 or newer (Works onWindows and Mac); make sure you Rhino is up to date.
• Python 3.10 or newer
• uv package manager

⚠️ Only run one instance of the MCP server (either on Cursor or Claude Desktop), not both

1. Go to Tools > Package Manager
2. Search for rhinomcp
3. Click Install

If you're on Mac, please install uv as

brew install uv

On Windows

powershell -c "irm https://astral.sh/uv/install.ps1 | iex"

⚠️ Do not proceed before installing UV

{
  "mcpServers": {
    "rhino": {
      "command": "uvx",
      "args": ["rhinomcp"]
    }
  }
}

Go to Claude > Settings > Developer > Edit Config > claude_desktop_config.json to include the above config file.

Make sure your cursor is up to date.

Create a folder .cursor in your project root.

Create a file mcp.json in the .cursor folder and include the above config file:

Go to Cursor Settings > MCP and check if it's enabled.

1. In Rhino, type mcpstart in the command line
2. Make sure the MCP server is running in the rhino terminal

Once the config file has been set on Claude, and the plugin is running on Rhino, you will see a hammer icon with tools for the RhinoMCP.

Once the config file has been set on Cursor, and the plugin is running on Rhino, you will see the green indicator in front of the MCP server.

If not, try refresh the server in Cursor. If any console pops up, please do not close it.

Once it's ready, use Ctrl+I to open the chat box and start chatting with Rhino. Make sure you've selected Agent mode.

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

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

• The get_document_info only fetches max 10 objects, layers, material etc. to avoid huge dataset that overwhelms Claude.
• Complex operations might need to be broken down into smaller steps

Contributions are welcome! Please feel free to submit a Pull Request.

This is a third-party integration and not made by Mcneel. Made by Jingcheng Chen