mcp-unity by CoderGamester is an open-source Unity MCP server with a Node.js bridge, with about 2k stars on GitHub.
mcp-unity hands your agent about 30 editor tools. Satura Space hands it the running game, and hands you four things no bridge has.
The agent sets up the moment and opens Unity's real Inspector on just the fields that matter. You tune it by feel.
Run agents in parallel, each in its own side Unity project, streamed beside the game. Open a Tuner on any of them.
Up to four synced editors, each streamed with its own input. One handle call starts every player on the same frame.
Ask about anything you don't know. Drift walks you through the UI, points at the field and explains what to tweak in the Inspector.
| Satura Space | mcp-unity | |
|---|---|---|
| The Tuner: an Inspector scoped to what matters | ✓Yes | ✕No |
| Ask Drift: a guide that points at the field | ✓Yes, in alpha | ✕No |
| Parallel agents in side projects | ✓Scratchpads, one Unity each | ✕Not listed |
| Multiplayer testing | ✓Four synced editors | ✕No |
| The running game, beside the agent | ✓Streamed, with your input | ✕Your own editor window |
| Agent plays and checks its work | ✓Handles, video and a report | Console logs, tests |
| Screenshots and video | ✓Both, 60 fps video | ✕Not listed |
| Play Mode control | ✓Yes | ✓Yes |
| Run C# in the editor | ✓Yes, unity.exec | ✕Not listed |
| Run tests | ✓Yes | ✓Yes |
| C# hot-reload in Play Mode | ✓Method bodies | ✕Not listed |
| Unity runs hidden | ✓Yes | Opt-in batch mode |
| Your own agent (which ones) | ✓CLI agents | ✓Any MCP client |
| Works inside your IDE | ✕No, desktop app; Cursor connects over MCP | ✓Cursor, Copilot |
| Open source | ✕No | ✓Yes, MIT |
| Unity versions | Unity 6 only, Mono | Unity 6 or later |
| Platforms | macOS Apple Silicon, Windows x64 | Windows, macOS |
| Price | $19/mo, $15 annual, 7-day trial | Free, MIT |
Yes, it is MIT-licensed. You still pay for your agent. Satura Space is $19 a month, or $15 billed annually, with a 7-day trial and no card.
Yes. Satura Space registers its Unity MCP server for Claude Code, Codex and Cursor automatically, and any MCP client can be pointed at it.
Both need Unity 6. Satura Space runs it with the Mono scripting backend.
Try it for seven days. No card needed.