Local-first Unity automation

Create in Unity.
Stay in control.

Connect Codex, Claude, Cursor or any MCP host directly to the Unity Editor—scene edits, C# evaluation, VRChat workflows and diagnostics through a loopback-only bridge.

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Unity 2022.3 LTSNode 20+Codex E2EMITv2.6.8
TunaSync Unity MCP — MCP bridge for the Unity Editor, built for VRChat creators
412public recipes
127.0.0.1loopback only
NMCP sessions
1-clickVCC install
Three steps

From VCC to a live editor.

Install the Unity package, register one MCP client, then verify the exact server and plugin versions.

01 / UNITY

Install from VCC

Use the button above, then add TunaSync Unity MCP from Manage Project.

02 / MCP

Choose your client

Codex, Claude, Cursor and generic stdio configurations are ready below.

Open client setup
03 / VERIFY

Run health + doctor

unity_health_check

npx -y tunasync-unity-mcp doctor

The Creator Console also shows connected process versions, jobs and compile diagnostics.

Client-aware

Copy the right setup, not a generic guess.

Each tab contains the exact stdio registration for that host. Restart or reconnect the MCP session after updating.




Designed for real projects
Automation with visible boundaries.
Local by construction
  • Unity listens only on 127.0.0.1 with a same-user registry token.
  • Multi-client write lease prevents simultaneous mutation.
  • Immediate local kill switch closes clients, jobs and discovery.
Human-gated publishing
  • VRChat upload has no AI-callable arm method.
  • One local click arms one upload for at most 30 minutes.
  • Creator Console exposes compile errors, job state and connected PIDs.



Built-in knowledge
Search all 412 public recipes.
Find a verified starting point by name, tag, category or description. Select a result to inspect its C# snippet.
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Make the editor answer back.
Install through VCC, connect your preferred MCP client, and ask for a health check.
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