Unity MCP usually refers to a Unity Editor integration that exposes Unity capabilities to AI agents through the Model Context Protocol.
They let AI clients call scene, asset, testing, or editor commands through MCP.
They wire clients like Cursor, Codex, or Claude to Unity through a local or hosted server.
They shorten loops around setup, testing, scene inspection, validation, and editor control.
XUUnity MCP is a lightweight Unity MCP and safe Unity MCP aimed at validation-heavy pipelines. Instead of trying to maximize tool count, it optimizes for compile validation, tests, scene assertions, setup review, and editor-only footprint.