Skip to content
mcp/harbor
Cursor

Three.js DevTools MCP for Cursor

io.github.dmitriygolub/threejs-devtools

Inspect and edit Three.js scenes, materials, shaders, lights in real time from any AI agent

client:Cursor transport:stdio runtime:npm

Install Three.js DevTools MCP in Cursor

~/.cursor/mcp.json · windows: %USERPROFILE%\.cursor\mcp.json

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "threejs-devtools": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "threejs-devtools-mcp"
      ],
      "env": {
        "DEV_PORT": "<DEV_PORT>",
        "BRIDGE_PORT": "<BRIDGE_PORT>",
        "BROWSER": "<BROWSER>",
        "HEADLESS": "<HEADLESS>",
        "CHROME_PATH": "<CHROME_PATH>"
      }
    }
  }
}

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs

Three.js DevTools MCP in other clients

Three.js DevTools MCP MCP server