Only Unity
The server is C# running in the Editor process. No Node.js, Python, separate server, account or subscription.
The MCP server that lives inside Unity
Let Claude Code, Codex, Cursor or any MCP client build, play, test and profile your Unity project. Nothing to install besides the package.
Any MCP client
Streamable HTTP (/mcp) and SSE (/sse) on the same server. Tested with Claude Code, Codex, Cursor and Claude Desktop.
The AI checks its own work
Playwright-style selectors, wait_for_selector, assert_ui_state and simulate_input let the AI play the game and verify the result.
Many Editors, no mix-ups
The port is derived from the project path, the client config is written for you, and /health names the project.
What an AI built with it
Section titled “What an AI built with it”One instruction per level, no human edits afterwards. The AI drove Unity through this server, checked its work with screenshots, input and tests, and fixed what it found.
