UnityMCP is a powerful Unity Editor plugin that implements the Model Context Protocol (MCP), enabling seamless integration between Unity and AI assistants. It provides real-time editor state monitoring, remote command execution, and comprehensive logging capabilities through a WebSocket connection.
The simplest way to install UnityMCP for Claude Desktop is automatically via Smithery:
npx -y @smithery/cli install @Arodoid/unitymcp --client claude
UnityMCPPlugin
folder to your Unity project's Assets directorycd unity-mcp-server
npm install
npm run build
To start the MCP server, run:
cd unity-mcp-server
node build/index.js
The get_editor_state
tool retrieves the current Unity Editor state, including:
The tool supports different output formats:
The execute_editor_command
tool lets you run C# code directly in the Unity Editor with:
// Center the selected object
Selection.activeGameObject.transform.position = Vector3.zero;
// Toggle play mode
EditorApplication.isPlaying = !EditorApplication.isPlaying;
// Create a new cube
GameObject.CreatePrimitive(PrimitiveType.Cube);
The get_logs
tool retrieves and filters Unity Editor logs with options for:
The system uses:
UnityMCP implements:
The system provides comprehensive error handling for:
To add this MCP server to Claude Code, run this command in your terminal:
claude mcp add-json "unitymcp" '{"command":"npx","args":["-y","@smithery/cli","install","@Arodoid/unitymcp","--client","claude"]}'
See the official Claude Code MCP documentation for more details.
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.
To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".
When you click that button the ~/.cursor/mcp.json
file will be opened and you can add your server like this:
{
"mcpServers": {
"unitymcp": {
"command": "npx",
"args": [
"-y",
"@smithery/cli",
"install",
"@Arodoid/unitymcp",
"--client",
"claude"
]
}
}
}
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.
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 explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.
To add this MCP server to Claude Desktop:
1. Find your configuration file:
~/Library/Application Support/Claude/claude_desktop_config.json
%APPDATA%\Claude\claude_desktop_config.json
~/.config/Claude/claude_desktop_config.json
2. Add this to your configuration file:
{
"mcpServers": {
"unitymcp": {
"command": "npx",
"args": [
"-y",
"@smithery/cli",
"install",
"@Arodoid/unitymcp",
"--client",
"claude"
]
}
}
}
3. Restart Claude Desktop for the changes to take effect