RhinoMCP

MCP serverCommunity

A PyPI server and Rhino 8 package that let an agent model geometry, read the document and wire Grasshopper canvases. By Jingcheng Chen.

1.2k 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
Operating systems: Windows, macOS
Needs a Rhino 3D & Grasshopper licence: Yes
Transport: Local (stdio)
AI clients documented: Claude Code, Codex, Cursor, Cline
Licence: MIT
Language: Python

What it can do

Creates and edits curves, surfaces and solids, including lofts, sweeps and booleans, and manages layers and object attributes.
Searches installed Grasshopper components, places and wires them, sets sliders and reads solved outputs, or builds a whole graph in one batched call.
Captures the viewport and measures lengths, areas and volumes so the agent works from what is on screen.
Falls back to native Rhino commands, RhinoScript-Python or RhinoCommon C# for anything the named tools don't cover.

Limitations

You start the TCP bridge in each Rhino session with the mcpstart command.
Run only one RhinoMCP server at a time across your AI clients.
The Python server, Rhino plugin and AI client update separately; the server warns when versions differ.

Install

claude mcp add rhino -- uvx rhinomcp@latest

Source: github.com/jingcheng-chen/rhinomcp#quick-start

codex mcp add rhino --env RHINO_MCP_HOST=127.0.0.1 -- uvx rhinomcp@latest

Source: github.com/jingcheng-chen/rhinomcp#quick-start

{
  "mcpServers": {
    "rhino": {
      "command": "uvx",
      "args": ["rhinomcp@latest"],
      "env": {
        "RHINO_MCP_HOST": "127.0.0.1"
      }
    }
  }
}

Source: github.com/jingcheng-chen/rhinomcp#quick-start

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.