Patina

Control the Unity Editor from any MCP host. One package install, one click, and your AI assistant can see your scene, create objects, and talk to the console.

Patina is a Rust MCP server paired with a C# Unity bridge. It connects your favorite AI coding tool directly to the Unity Editor over a local TCP channel, with zero manual config.

Why Patina?

• One-click setup. Install the UPM package, click a button, and every supported host is configured automatically.
• No Rust required. Release packages ship pre-built binaries for Windows, Linux, and macOS. Just install and go.
• Built for speed. The Rust sidecar keeps the MCP layer fast and lightweight while Unity stays on the main thread.
• Multi-host. Works with Claude Code, Cursor, VS Code, Gemini CLI, JetBrains Rider, Codex CLI, and more.

How It Works

MCP Host  <-- stdio -->  Patina Server  <-- local TCP -->  Unity Editor

The host launches the Rust binary over stdio MCP. The Rust server forwards tool calls into Unity through a local loopback TCP bridge. Unity executes them on the main thread and returns the result.

Quick Start

1. Install the Unity package

In Unity, open Project Settings > Package Manager, add a scoped registry, then install the package by name.

Scoped registry:

Then open the Package Manager (Window > Package Manager), click the + icon in the top left, select Add package by name..., and enter:

com.taygunsavas.patina-unity-mcp

Registry releases are signed during the release workflow for Unity Package Manager verification.

Alternatively, open the Package Manager, click the + icon, select Add package from git URL..., and enter:

https://github.com/taygunsavas/patina-unity-mcp.git?path=/unity-package

Patina is distributed as a complete Unity package artifact with the editor code, native Rust runtime binaries under Plugins/<platform>/, and the Unity metadata needed for import. End users do not need the Rust toolchain or a Git checkout of this repository.

2. Run One-Click Setup

Open Window > Patina Unity MCP and click One-Click Setup.

The setup flow verifies the binary, starts the Unity bridge, auto-configures every detected host, replaces stale entries, and shows restart guidance where needed.

Patina writes host configs to a stable user-level runtime path instead of a per-project Unity package cache path. When the package is updated, the Unity editor package refreshes that managed runtime automatically, so supported MCP hosts do not need to be reconfigured just because the package cache path changed.

3. Start building

Open your MCP host and try:

• "Log hello to Unity console"
• "Show me the scene hierarchy"
• "Create a cube at position 0, 2, 0"

Available Capabilities

Patina keeps the advertised MCP surface compact so hosts do not need to load every Unity command schema into context. Agents should use:

The 87 commands below are available through patina_capabilities and patina_call.

Scene

GameObjects

Components & Properties

Batch Operations

Prefabs

Example: Set a component reference within a prefab.

To point a serialized field at another component inside the same prefab, pass an edit_prefab_asset action with set_field and an object reference value. The transform_path inside value is resolved against the prefab root, not against the action's own transform_path:

{
  "asset_path": "Assets/Prefabs/MyPrefab.prefab",
  "actions": [
    {
      "action_type": "set_field",
      "component_type": "MyNamespace.MyComponent",
      "field_name": "targetReference",
      "value": {"transform_path": "Container/Button", "component_type": "MyNamespace.TargetComponent"}
    }
  ]
}

Assets

Materials

Scripts