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RhinoAI (Rhino MCP Platform)

MCP serverOfficial · Beta

McNeel's Rhino plugin that turns a running Rhino and Grasshopper into an MCP server, with a Claude Desktop connector. By Robert McNeel & Associates.

396 starsUpdated 2 days agoGitHub data from 5 Nov 2026

At a glance

Type
MCP server
Works with
Rhino 3D & Grasshopper
How it connects
Drives a running copy of the tool
Access
Can modify models
Tool versions
Rhino 8 through the Package Manager (package Rhino-MCP-Platform); included by default in Rhino BETA, with Rhino 9 WIP also mentioned
Operating systems
Windows, macOS
Needs a Rhino 3D & Grasshopper licence
Yes
Transport
Remote (HTTP)
AI clients documented
Claude Desktop, Claude Code, GitHub Copilot, Codex, Gemini CLI, Local models (LM Studio)
Licence
MIT
Language
C#
Release status
beta

What it can do

  • The MCPConnect command in Rhino starts the MCP server; external clients then model, inspect and edit the open document and its Grasshopper canvases.
  • Builds, reviews and converts Grasshopper definitions, including GH1 to GH2 upgrades, and runs Python and C# scripts and Rhino commands.
  • Can start, close and restart Rhino, load plugins, open and save files, and run several Rhino copies side by side.
  • Ships an in-Rhino chat panel (the AI command) for Claude and Codex, and a Claude Code plugin with scene and snapshot commands and a modelling agent.

Limitations

  • Labelled a Rhino BETA feature; McNeel describes the integration as just beginning.
  • Tools such as run_python, run_csharp and run_command execute arbitrary code in Rhino and can reach any file your account can, per McNeel's privacy note.
  • Results, including viewport screenshots, are sent to your AI client's provider.

Install

Download connector.mcpb from the RhinoAI releases, then in Claude Desktop go to Settings > Extensions > Advanced settings, click Install Extension and select it. Install the Rhino-MCP-Platform package in Rhino 8 through the Package Manager, or ask the connector to install it.

Source: github.com/mcneel/RhinoAI/blob/main/docs/content/docs/getting-started/connector.md

MCP servers and skills run code on your computer. Review the source before installing.

AI-generated models, drawings and results must be checked by a qualified engineer before use.