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Three.js DevTools MCP

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

MCP · local★ 128updated 14 Oct 2026by io.github.DmitriyGolub
Open on GitHub ↗
run in your terminal
claude mcp add three-js-devtools-mcp -- npx -y threejs-devtools-mcp

How to start

  1. Run the command in your terminal, in the project where you want it.
  2. Sign in if asked the first time Claude connects.
  3. Check it: run /mcp in Claude Code and look for it in the list.

What it needs

  • DEV_PORTOptional. Dev server port to proxy (auto-detected from package.json if not set)
  • BRIDGE_PORTOptional. Bridge proxy port (default: 9222)
  • BROWSEROptional. Set to 'none' to disable auto-opening browser
  • HEADLESSOptional. Set to 'true' for headless browser mode (CI)
  • CHROME_PATHOptional. Custom Chrome/Edge executable path

Environment variables as listed in the server's MCP Registry entry.

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