MCP Unity Editor (Game Engine)

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MCP Unity is an implementation of the Model Context Protocol for Unity Editor, allowing AI assistants to interact with your Unity projects. This package provides a bridge between Unity and a Node.js server that implements the MCP protocol, enabling AI agents like Cursor, Windsurf, Claude Code, Codex CLI, GitHub Copilot, Google Antigravity, and OpenCode to execute operations within the Unity Editor.

Features

IDE Integration - Package Cache Access

MCP Unity provides automatic integration with VSCode-like IDEs (Visual Studio Code, Cursor, Windsurf, Google Antigravity) by adding the Unity Library/PackedCache folder to your workspace. This feature:

• Improves code intelligence for Unity packages
• Enables better autocompletion and type information for Unity packages
• Helps AI coding assistants understand your project's dependencies

MCP Server Tools

The following tools are available for manipulating and querying Unity scenes and GameObjects via MCP:

• execute_menu_item: Executes Unity menu items (functions tagged with the MenuItem attribute)

  Example prompt: "Execute the menu item 'GameObject/Create Empty' to create a new empty GameObject"

• select_gameobject: Selects game objects in the Unity hierarchy by path or instance ID

  Example prompt: "Select the Main Camera object in my scene"

• update_gameobject: Updates a GameObject's core properties (name, tag, layer, active/static state), or creates the GameObject if it does not exist

  Example prompt: "Set the Player object's tag to 'Enemy' and make it inactive"

• update_component: Updates component fields on a GameObject or adds it to the GameObject if it does not contain the component

  Example prompt: "Add a Rigidbody component to the Player object and set its mass to 5"

• add_package: Installs new packages in the Unity Package Manager

  Example prompt: "Add the TextMeshPro package to my project"

• run_tests: Runs tests using the Unity Test Runner

  Example prompt: "Run all the EditMode tests in my project"

• send_console_log: Send a console log to Unity

  Example prompt: "Send a console log to Unity Editor"

• add_asset_to_scene: Adds an asset from the AssetDatabase to the Unity scene

  Example prompt: "Add the Player prefab from my project to the current scene"

• create_prefab: Creates a prefab with optional MonoBehaviour script and serialized field values

  Example prompt: "Create a prefab named 'Player' from the 'PlayerController' script"

• create_scene: Creates a new scene and saves it to the specified path

  Example prompt: "Create a new scene called 'Level1' in the Scenes folder"

• load_scene: Loads a scene by path or name, with optional additive loading

  Example prompt: "Load the MainMenu scene"

• delete_scene: Deletes a scene by path or name and removes it from Build Settings

  Example prompt: "Delete the old TestScene from my project"

• get_gameobject: Gets detailed information about a specific GameObject including all components

  Example prompt: "Get the details of the Player GameObject"

• get_console_logs: Retrieves logs from the Unity console with pagination support

  Example prompt: "Show me the last 20 error logs from the Unity console"

• recompile_scripts: Recompiles all scripts in the Unity project

  Example prompt: "Recompile scripts in my Unity project"

• save_scene: Saves the current active scene, with optional Save As to a new path

  Example prompt: "Save the current scene" or "Save the scene as 'Assets/Scenes/Level2.unity'"

• get_scene_info: Gets information about the active scene including name, path, dirty state, and all loaded scenes

  Example prompt: "What scenes are currently loaded in my project?"

• unload_scene: Unloads a scene from the hierarchy (does not delete the scene asset)

  Example prompt: "Unload the UI scene from the hierarchy"

• duplicate_gameobject: Duplicates a GameObject in the scene with optional renaming and reparenting

  Example prompt: "Duplicate the Enemy prefab 5 times and rename them Enemy_1 through Enemy_5"

• delete_gameobject: Deletes a GameObject from the scene

  Example prompt: "Delete the old Player object from the scene"

• reparent_gameobject: Changes the parent of a GameObject in the hierarchy

  Example prompt: "Move the HealthBar object to be a child of the UI Canvas"

• move_gameobject: Moves a GameObject to a new position (local or world space)

  Example prompt: "Move the Player object to position (10, 0, 5) in world space"

• rotate_gameobject: Rotates a GameObject to a new rotation (local or world space, Euler angles or quaternion)

  Example prompt: "Rotate the Camera 45 degrees on the Y axis"

• scale_gameobject: Scales a GameObject to a new local scale

  Example prompt: "Scale the Enemy object to twice its size"

• set_transform: Sets position, rotation, and scale of a GameObject in a single operation

  Example prompt: "Set the Cube's position to (0, 5, 0), rotation to (0, 90, 0), and scale to (2, 2, 2)"

• create_material: Creates a new material with specified shader and saves it to the project

  Example prompt: "Create a red material called 'EnemyMaterial' using the URP Lit shader"

• assign_material: Assigns a material to a GameObject's Renderer component

  Example prompt: "Assign the 'EnemyMaterial' to the Enemy GameObject"

• modify_material: Modifies properties of an existing material (colors, floats, textures)

  Example prompt: "Change the color of 'EnemyMaterial' to blue and set metallic to 0.8"

• get_material_info: Gets detailed information about a material including shader and all properties

  Example prompt: "Show me all the properties of the 'PlayerMaterial'"

• batch_execute: Executes multiple tool operations in a single batch request, reducing round-trips and enabling atomic operations with optional rollback on failure

  Example prompt: "Create 10 empty GameObjects named Enemy_1 through Enemy_10 in a single batch operation"

MCP Server Resources

• unity://menu-items: Retrieves a list of all available menu items in the Unity Editor to facilitate execute_menu_item tool

  Example prompt: "Show me all available menu items related to GameObject creation"

• unity://scenes-hierarchy: Retrieves a list of all game objects in the current Unity scene hierarchy

  Example prompt: "Show me the current scenes hierarchy structure"

• unity://gameobject/{id}: Retrieves detailed information about a specific GameObject by instance ID or object path in the scene hierarchy, including all GameObject components with it's serialized properties and fields

  Example prompt: "Get me detailed information about the Player