Unity Code MCP
Autonomous Unity development for AI agents. Compile code and run tests directly in the Unity Editor.
MCP Server
Free✦
12 stars on GitHub with MIT open source license
✦
Self-contained single binary — only 1MB memory when idle, 10MB with Unity Editor
✦
Comes with 2 MCP tools: Asset Database Refresh and Test Execution
What is Unity Code MCP? Features and use cases explained.
About Unity Code MCP
Unity Code MCP is a high-performance, coding-focused MCP server built in Rust that enables AI agents to autonomously develop Unity code. It handles Unity's compilation cycles gracefully and provides two essential tools: asset database refresh (for compilation feedback) and test execution. The server is lightweight (1MB idle, 10MB with Unity open) and communicates via UDP, minimizing system load. AI agents can write code, compile, fix errors, run tests, and iterate—just like a human developer. No runtime dependencies (no Node.js, Python, or .NET) are required.
Use Cases
- ▸Autonomously create and compile a player controller script, fixing errors in real-time
- ▸Write unit tests for game logic and run them to validate behavior without manual intervention
- ▸Iterate on code using a compile-test loop while the AI agent remains in control
Features
- ✓Triggers Unity compilation and returns compile errors or success messages
- ✓Runs Unity tests (EditMode and PlayMode) with detailed stack traces and logs
- ✓Operates as a self-contained single binary with minimal memory footprint
- ✓Handles Unity domain reload gracefully during asset refresh
FAQ
Does Unity Code MCP work with any Unity version?▼
Yes, it works with any Unity project that supports the Unity Editor. It communicates via UDP and does not depend on specific Unity Editor versions.
Do I need to install additional runtimes like Node.js or Python?▼
No, Unity Code MCP is a single binary with zero runtime dependencies. Just download and run.
How do I set up Unity Code MCP with my AI agent?▼
Start the MCP server and configure your AI client (e.g., Claude, Cursor) to use it as an MCP tool. Then the AI can call refresh_asset_database and run_tests directly.
How to install Unity Code MCP — setup guide and prerequisites.
Installation
Install Unity Code MCP to get started:
$git clone https://github.com/hackerzhuli/unity_code_mcp.git
Or visit the project page for detailed setup instructions.
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