Unity-MCP by Ivan Murzak is an open-source Unity MCP server with 70+ tools and about 4.5k stars on GitHub.
Unity-MCP is a free bridge with 70+ tools for your agent. Satura Space shows you the running game and adds a Tuner, Drift, scratchpads and multiplayer testing that 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 | Unity-MCP | |
|---|---|---|
| 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 | ✕Screenshots for the agent |
| Agent plays and checks its work | ✓Handles, video and a report | Play Mode, tests, screenshots |
| Screenshots and video | ✓Both, 60 fps video | Screenshots, no video |
| Play Mode control | ✓Yes | ✓Yes |
| Run C# in the editor | ✓Yes, unity.exec | ✓Yes, Roslyn |
| Run tests | ✓Yes | ✓Yes |
| C# hot-reload in Play Mode | ✓Method bodies | ✕Not listed |
| Unity runs hidden | ✓Yes | ✕Not listed |
| Your own agent (which ones) | ✓CLI agents | ✓Any MCP client |
| Works inside your IDE | ✕No, desktop app; Cursor connects over MCP | ✓Cursor, VS Code |
| Open source | ✕No | ✓Yes, Apache-2.0 |
| Unity versions | Unity 6 only, Mono | ✕Not listed |
| Platforms | macOS Apple Silicon, Windows x64 | ✓Windows, macOS, Linux |
| Price | $19/mo, $15 annual, 7-day trial | Free, Apache-2.0 |
Yes, it is open source under Apache-2.0, and its README says it works with major AI agents for free. Satura Space is $19 a month, or $15 billed annually, with a 7-day trial and no card.
Yes, it can run inside a compiled game. Satura Space works on the editor, with no player build in the loop.
Probably. Unity-MCP is a package and Satura Space is a separate app. We haven't tested the two together.
Try it for seven days. No card needed.