Onshape MCP Server

Enhanced Model Context Protocol (MCP) server for programmatic CAD modeling with Onshape.

✨ Features

🔍 Document Discovery - Search and list projects, find Part Studios
📐 Parametric Sketching - Create sketches with rectangles, circles, lines
⚙️ Feature Management - Extrudes, fillets, chamfers, feature trees
🔩 Mechanical Components - Create gears with customizable parameters
🎯 Edge Query & Discovery - Find edges by radius, type, or feature
📊 Variable Tables - Read/write parametric design variables
🤖 Full Automation - Build complete CAD workflows

🚀 Quick Start

Prerequisites

Python 3.10+
Onshape account with API access

Setup

git clone https://github.com/clarsbyte/onshape-mcp.git
cd onshape-mcp
python -m venv venv
source venv/bin/activate  # Windows: venv\Scripts\activate
pip install -e .

Get API Keys

Go to Onshape Developer Portal
Create API key → copy Access Key and Secret Key

Configure Gemini CLI

Add to your Gemini CLI configuration file (typically ~/.config/gemini-cli/settings.json):

{
  "mcpServers": {
    "onshape": {
      "command": "/absolute/path/to/onshape-mcp/venv/bin/python",
      "args": ["-m", "onshape_mcp.server"],
      "env": {
        "ONSHAPE_ACCESS_KEY": "your_access_key",
        "ONSHAPE_SECRET_KEY": "your_secret_key"
      }
    }
  }
}

Usage

onshape-mcp  # Run server

Ask Gemini CLI: "Create a mechanical part with variable dimensions""