MCP server CX Codex

KitWright Unity MCP — Unity MCP server: setup and features

Q: How do I install KitWright Unity MCP in Unity?

In Unity, open `Window > Package Manager > + > Add package from git URL`, then enter `https://github.com/kitwright/unity-mcp.git#upm`.

This MCP server lets an AI client work inside a running Unity Editor, from building scenes and scripts to taking screenshots and testing play mode.

Open on GitHub

What KitWright Unity MCP does

KitWright Unity MCP connects an AI client to a live Unity Editor through MCP. Its built-in tools can run code, build scenes, generate scripts, configure UI, switch Play Mode, simulate input, capture screenshots, and inspect performance. The package includes 274 tools.

Start the server from Window > KitWright > MCP Window, then use its one-click client setup for Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, or Zed. Unity 2022.3 or later is required, and the server runs in the editor only. With an Asset Store install, skipping com.unity.nuget.newtonsoft-json leaves KitWright scripts unable to compile.

What it helps with

build a Unity scene from a brief
generate scripts for game logic
check a project in Play Mode
simulate player input
capture scene-state screenshots

Example prompts for the agent

Build a snake scene with a 10x10 grid, food, score display, and a game-over screen.
Search the project prefabs and assemble a city scene from them.
Run the game, test its controls, and capture screenshots of the main states.

How to install KitWright Unity MCP

Install

The MCP registry has no launch command for it: see the repository README

Step by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more

Questions about KitWright Unity MCP

How do I install KitWright Unity MCP in Unity?

In Unity, open Window > Package Manager > + > Add package from git URL, then enter https://github.com/kitwright/unity-mcp.git#upm.

What does KitWright Unity MCP do?

It lets an AI client operate a running Unity Editor through MCP, with tools for scenes, scripts, Play Mode, screenshots, input simulation, and performance checks.

Which Unity version does KitWright Unity MCP require?

Use Unity 2022.3 or later. The server runs in the Unity Editor only.

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