Three.js DevTools MCP

An MCP server that allows AI agents to inspect and edit Three.js scenes, materials, shaders, and lights in real time. It provides 69 tools for objects, materials, shaders, textures, animation, performance, and memory analysis. It works with vanilla Three.js and React Three Fiber, auto-detects the dev server port, and injects a bridge into the browser for live previews and code generation.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by DmitriyGolub

Vendor documentation

What you can do with it

Inspect scene tree and material details
Live preview material property changes
Audit websites for mobile performance
Record video frames at 60 fps

Source and maintenance

Community listingRegistry 0.2.1

mcp-registry: io.github.DmitriyGolub/threejs-devtools@0.2.1 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

threejs-devtools-mcp 0.2.1

npmnpx

threejs-devtools-mcp package definition

{
  "version": "0.2.1",
  "transport": "stdio",
  "identifier": "threejs-devtools-mcp",
  "runtimeHint": "npx",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "DEV_PORT",
      "format": "string",
      "description": "Dev server port to proxy (auto-detected from package.json if not set)"
    },
    {
      "name": "BRIDGE_PORT",
      "format": "string",
      "description": "Bridge proxy port (default: 9222)"
    },
    {
      "name": "BROWSER",
      "format": "string",
      "description": "Set to 'none' to disable auto-opening browser"
    },
    {
      "name": "HEADLESS",
      "format": "string",
      "description": "Set to 'true' for headless browser mode (CI)"
    },
    {
      "name": "CHROME_PATH",
      "format": "string",
      "description": "Custom Chrome/Edge executable path"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "three-js-devtools-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "threejs-devtools-mcp@0.2.1"
      ],
      "env": {
        "DEV_PORT": "<YOUR_DEV_PORT>",
        "BRIDGE_PORT": "<YOUR_BRIDGE_PORT>",
        "BROWSER": "<YOUR_BROWSER>",
        "HEADLESS": "<YOUR_HEADLESS>",
        "CHROME_PATH": "<YOUR_CHROME_PATH>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "three-js-devtools-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "threejs-devtools-mcp@0.2.1"
      ],
      "env": {
        "DEV_PORT": "<YOUR_DEV_PORT>",
        "BRIDGE_PORT": "<YOUR_BRIDGE_PORT>",
        "BROWSER": "<YOUR_BROWSER>",
        "HEADLESS": "<YOUR_HEADLESS>",
        "CHROME_PATH": "<YOUR_CHROME_PATH>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "three-js-devtools-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "threejs-devtools-mcp@0.2.1"
      ],
      "env": {
        "DEV_PORT": "<YOUR_DEV_PORT>",
        "BRIDGE_PORT": "<YOUR_BRIDGE_PORT>",
        "BROWSER": "<YOUR_BROWSER>",
        "HEADLESS": "<YOUR_HEADLESS>",
        "CHROME_PATH": "<YOUR_CHROME_PATH>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "three-js-devtools-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "threejs-devtools-mcp@0.2.1"
      ],
      "env": {
        "DEV_PORT": "<YOUR_DEV_PORT>",
        "BRIDGE_PORT": "<YOUR_BRIDGE_PORT>",
        "BROWSER": "<YOUR_BROWSER>",
        "HEADLESS": "<YOUR_HEADLESS>",
        "CHROME_PATH": "<YOUR_CHROME_PATH>"
      }
    }
  }
}

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