Unity Code MCP Server

What it is

A Unity Editor package that serves MCP from inside the editor. The agent executes generated C# in the editor's own context, reads the console back, runs tests, and can drive and observe a running game.

What you get

• execute_csharp_script_in_unity_editor — run generated C# with full access to UnityEngine and UnityEditor APIs and reflection; logs, errors and return values are captured automatically
• read_unity_console_logs — read the Editor console, with a configurable entry limit
• run_unity_tests — run tests through the Test Runner in EditMode, PlayMode or both, all of them or filtered by fully qualified name
• enter_play_mode — enter Play Mode with time paused, and return as soon as the transition is triggered
• play_unity_game — unpause, simulate the configured Input System actions, collect logs, then pause again
• get_unity_game_view_window_screenshot — capture the Game View as an image without routing through gameplay input
• exit_play_mode — leave Play Mode and unpause
• get_unity_info — the current project and the server's own settings
• Bundled agent skills that teach the execute-then-read-console loop and the play-and-observe loop

Requirements

Unity 2022.3 LTS or higher, and uv for the bundled stdio bridge. Install the package from its git URL through the Unity Package Manager; the editor auto-starts a file-backed transport and the client is pointed at the bridge with uv. Set an Input Actions asset in the server settings if you want gameplay simulation. The agent's C# runs with the same privileges as the Unity Editor process.

Setup effort

Follow the published steps — Install uv: Follow instructions at https://docs.astral.sh/uv/getting-started/installation

Tools you get

8 tools named in the project's documentation.

Where it runs

The documented client runs the server on your machine.