KitWright Unity MCP server

KitWright MCP for Unity The Most Advanced MCP Server for Unity Editor 中文 | English

💖 If you find this project useful, please consider giving it a Star. It helps more Unity developers discover it and supports ongoing development.

KitWright MCP for Unity is an MIT-licensed Unity Editor MCP server that lets AI assistants like Claude Code, Cursor, LM Studio, Windsurf, Codex, and VS Code Copilot operate directly inside your running Unity project.

Describe your game in one sentence — your AI assistant builds it in Unity through KitWright MCP for Unity's 274 built-in tools for scene creation, script generation, runtime validation, input simulation, performance analysis, and editor automation.

"Build a snake game with a 10x10 grid, food spawning, score UI, and game-over screen"

Your AI assistant handles it through KitWright MCP for Unity: creates the scene, generates all scripts, sets up the UI, and configures the game logic — all from a single prompt.

Demo — AI searches project prefabs and builds a city scene through MCP tools. Watch HD MP4.

Quick Start

If you just want to get connected fast, do these three things:

• Install the Unity package from the Git URL
• Open Window > KitWright > MCP Window and start the server from the Server tab
• Use the built-in one-click client configuration

1. Install via UPM (Git URL)

In Unity, go to Window → Package Manager → + → Add package from git URL:

https://github.com/kitwright/unity-mcp.git

💡 Before you clone or install, a quick ⭐ on GitHub would be greatly appreciated.

Optional: Install via OpenUPM

If you want Unity Package Manager to show registry-backed package version history and allow version selection, install from OpenUPM instead of Git.

Using the OpenUPM CLI:

openupm add com.kitwright.unity.mcp

Or add the scoped registry manually in Packages/manifest.json:

{
  "scopedRegistries": [
    {
      "name": "OpenUPM",
      "url": "https://package.openupm.com",
      "scopes": [
        "com.kitwright"
      ]
    }
  ],
  "dependencies": {
    "com.kitwright.unity.mcp": "1.0.0"
  }
}

If you installed from a Git URL before, remove the Git dependency first, then install from OpenUPM. Git-installed packages only show the resolved Git version in Unity and do not get the registry-backed Version History list.

Optional: Install from the Unity Asset Store

Importing the Asset Store package shows a This Unity Package has Package Manager dependencies dialog. Choose Install/Upgrade — the package needs com.unity.nuget.newtonsoft-json, and skipping the prompt leaves the project without it, which stops every KitWright script from compiling.

If you already chose Skip, the package offers to install the dependency for you on the next domain reload; you can also add it yourself from Window → Package Manager → + → Add package by name:

com.unity.nuget.newtonsoft-json

2. Start the MCP Server

Shortened. The full README is on GitHub.