Unity MCP is a plugin that connects the Unity Editor to AI assistants through the Model Context Protocol, enabling natural language control over scene manipulation, object creation, and editor workflows. It allows developers to generate C# scripts, modify GameObjects and components, create UI layouts, and manage assets by issuing commands through an AI interface, effectively turning the editor into a conversational development environment.
The plugin distinguishes itself through a comprehensive automation system that can execute multi-step tasks from a design document, record and replay editor actions, and run headless tests across multiple Unity versions. It provides granular control over AI behavior through configurable execution modes, tool groups, and per-tool toggles, while supporting remote editor control, user session isolation, and API key authentication for secure access. The system also includes semantic validation of generated scripts and the ability to integrate external MCP servers for extended capabilities like 3D model generation.
Beyond core editor control, the plugin offers capabilities for generating 3D assets from text prompts, adapting scene themes, analyzing scenes for optimization, and creating asset variations. It supports multi-instance management for routing calls to specific editor sessions, and provides tools for accessing Unity documentation, explaining concepts, and refining prompts with project context. The configuration surface includes options for choosing AI models, defining custom project rules, and managing API keys directly within the editor interface.
