Funplay Unity MCP — Claude Code MCP server
Connects an AI assistant to a running Unity Editor so it can build scenes, write scripts, and test gameplay. Useful for turning a short game brief into a working project.
Open on GitHubWhat Funplay Unity MCP does
Funplay Unity MCP connects an AI assistant to an open Unity project through MCP. The assistant can build scenes, create C# scripts, arrange UI, run checks during play, simulate input, and operate editor tasks. It targets Unity 2022.3+ and runs in the Editor rather than in a built game.
Install the package in Unity through Package Manager using the Git URL, then open Funplay > MCP Server. Its One-Click MCP Configuration can write a client entry for Claude Code, Codex, Cursor, and other supported clients. The server exposes a local address such as http://127.0.0.1:<port>/, with project-specific ports available when several editors are open.
Direct local HTTP is the default transport. Experimental Broker Mode keeps the MCP endpoint stable through Unity script recompiles and Play Mode domain reloads. The client cannot connect until Funplay > MCP Server is running.
What it helps with
- build a Unity scene from a written game brief
- generate C# scripts and wire up game logic
- place UI elements in the editor
- run gameplay checks while the scene is active
- simulate controls during a test session
Example prompts for the agent
- Create a snake scene in the open Unity project with a 10x10 grid, food, score display, and a game-over screen.
- Write the scripts for this scene and connect the required Unity objects.
- Run the scene, test its controls, and fix the issues you find.
How to install Funplay Unity MCP
Install
The MCP registry has no launch command for it: see the repository README
Step by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about Funplay Unity MCP
How do I install Funplay Unity MCP in Claude Code?
In Unity, open Window → Package Manager → + → Add package from git URL and paste https://github.com/FunplayAI/funplay-unity-mcp.git. Start Funplay > MCP Server, select Claude Code in One-Click MCP Configuration, and click Configure.
What does Funplay Unity MCP do?
It gives an AI assistant access to a running Unity Editor through MCP. The assistant can create scenes, generate scripts, configure UI, and perform project checks from a prompt.
Which clients work with Funplay Unity MCP?
Supported clients include Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, and Zed. Configure the connection from the Funplay > MCP Server window.
