Unity-MCP

# Introduction to Unity-MCP ## Overview Unity-MCP is a bridge between Unity and AI assistants using the Model Context Protocol (MCP). It enables AI assistants like Claude to interact with Unity game environments through a standardized interface, allowing for AI-assisted game development, automated testing, scene analysis, and runtime debugging. ## Purpose The primary purpose of Unity-MCP is to provide a standardized way for AI assistants to: 1. **Execute code** in the Unity runtime environment 2. **Inspect game objects** and their components 3. **Analyze scene hierarchies** and structures 4. **Run tests** and receive results 5. **Invoke methods** on game objects and components 6. **Modify game state** during runtime ## Key Benefits - **AI-Assisted Development**: Enable AI assistants to understand and modify Unity projects - **Automated Testing**: Run tests from AI assistants and analyze results - **Runtime Inspection**: Examine the state of a running Unity game - **Code Execution**: Execute arbitrary C# code in the Unity environment - **Standardized Interface**: Use the MCP standard for compatibility with various AI assistants - **Bidirectional Communication**: Allow both AI-to-Unity and Unity-to-AI communication ## Four-Component Architecture Unity-MCP implements a four-component architecture: 1. **MCP STDIO Client**: A command-line tool that implements the MCP protocol using the official TypeScript SDK 2. **Web Server with Persistence**: A long-running service that maintains state across sessions 3. **Unity Integration**: A plugin for Unity that executes code and communicates with the Web Server 4. **Unity SDK**: A C# library that Unity developers can use to interact with the system Each component has a specific role in the architecture, and they work together to provide a complete solution for AI-Unity interaction. ## Communication Flow The communication flow between Claude and Unity is as follows: ``` Claude <-- stdio --> MCP STDIO Client <-- HTTP --> Web Server <-- HTTP/WebSockets --> Unity Integration ^ | v Unity SDK (used by Unity developers) ``` This architecture provides several benefits: - Claude interacts with the MCP STDIO client using the standard MCP protocol - The web server maintains state between interactions - Unity only needs to communicate with the web server, not directly with Claude - Unity developers can use a simple SDK to interact with the system ## Documentation Structure This documentation is organized into the following sections: 1. **Introduction**: Overview of Unity-MCP (this document) 2. **Model Context Protocol**: Explanation of the MCP protocol and how it's used in Unity-MCP 3. **Architecture**: Detailed description of the four-component architecture 4. **MCP STDIO Client**: Documentation for the command-line tool that implements MCP 5. **Web Server**: Documentation for the persistent web server 6. **Unity Integration**: Documentation for the Unity plugin 7. **Unity SDK**: Documentation for the C# library used by Unity developers 8. **Tools and Capabilities**: Description of the tools and capabilities provided by Unity-MCP 9. **Installation and Setup**: Instructions for installing and setting up Unity-MCP 10. **Usage Examples**: Examples of using Unity-MCP in various scenarios 11. **Security Considerations**: Security implications and best practices 12. **Troubleshooting**: Common issues and their solutions ## Getting Started To get started with Unity-MCP, see the [Installation and Setup](09-installation-setup.md) guide.