# Unity MCP review

> Unity MCP is an open-source bridge that lets AI assistants control the Unity Editor through the Model Context Protocol.

Devtoolwatch Board, the week of Oct 25–31, 2026. Canonical page: https://index.devtoolwatch.com/tools/unity-mcp/

## TL;DR

Unity MCP, also called MCP for Unity, connects MCP clients such as Claude, Codex, Cursor and VS Code to the Unity Editor. Unity developers can use it to manage assets, control scenes, edit scripts and run tests in natural language. It exposes 50 tools in groups, supports HTTP or stdio, and can route one session across multiple open Editors.

## Unity MCP at a glance

- **Category:** [MCP and agent tools](https://index.devtoolwatch.com/categories/mcp-servers/)
- **Maintained by:** Coplay (organization, [@CoplayDev](https://github.com/CoplayDev) on GitHub)
- **License:** MIT
- **Language:** C#, Python, JavaScript
- **Repository:** [github.com/CoplayDev/unity-mcp](https://github.com/CoplayDev/unity-mcp)
- **Website:** [coplaydev.github.io/unity-mcp](https://coplaydev.github.io/unity-mcp/)
- **Latest release:** [v10.3.0](https://github.com/CoplayDev/unity-mcp/releases/tag/v10.3.0) on GitHub, Oct 4, 2026
- **First published:** Mar 18, 2025

## What Unity MCP does

- Unity MCP creates scenes and GameObjects and drives prefabs and materials from natural-language prompts.
- Unity MCP edits C# scripts, manages assets, runs tests, profiles, and builds from any MCP client.
- Unity MCP routes a single MCP session to any of several open Unity Editors, with session isolation across clients.
- Unity MCP lets you activate tool groups such as animation, vfx, ui, testing or probuilder only when needed.
- Unity MCP supports custom tools registered with a C# attribute, project-scoped or global.
- Unity MCP v10 added AI asset generation for 3D, 2D images and audio, using your own key.
- Unity MCP offers Roslyn script validation and a remote-hosted server option with auth.

### How it works

Unity MCP has three layers. Your MCP client talks over stdio or HTTP to a Python server built on FastMCP. The server handles routing and session isolation, and talks over WebSocket to a C# Editor plugin. The plugin runs inside the Unity Editor process and executes commands through Unity Editor APIs on the main thread. Everything runs on your machine.

## How to install Unity MCP

**Unity Package Manager (git URL, stable)**

```
https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#main
```

**Unity Package Manager (git URL, beta)**

```
https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#beta
```

**With OpenUPM**

```
openupm add com.coplaydev.unity-mcp
```

### Requirements

- Unity 2021.3 LTS through 6.x
- Python 3.10 or later, via uv
- An MCP client such as Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Cline or Gemini CLI

### First steps

1. In Unity, open Package Manager, choose Add package from git URL, and paste the Unity MCP git URL.
2. Open Window → MCP for Unity → Configure All Detected Clients to set up your MCP clients.
3. Prompt your assistant, for example: "Create a cube at the origin and add a Rigidbody."

## Who Unity MCP is for

- Unity developers who want an AI assistant to build scenes, edit scripts and manage assets
- Teams running multiple Unity Editors or multi-agent, remote-hosted workflows over HTTP
- Developers who want to extend their AI assistant with custom Unity tools written in C#

### Limitations

- Unity MCP treats Codex as a stdio-only client.
- Unity MCP asset generation requires bringing your own provider key.
- Unity MCP is not affiliated with Unity Technologies.

## Usage data (the week of Oct 25–31, 2026)

- Board rank: #84 overall, #7 in MCP and agent tools, momentum score 67
- New GitHub stars per week (last 12 weeks): Aug 9: 172; Aug 16: 169; Aug 23: 168; Aug 30: 207; Sep 6: 231; Sep 13: 183; Sep 20: 180; Sep 27: 171; Oct 4: 177; Oct 11: 249; Oct 18: 331; Oct 25: 226

## Unity MCP alternatives

| Rank | Tool | Stars | Downloads/wk |
|---|---|---|---|
| #1 | [REA](https://index.devtoolwatch.com/tools/morluto-rea/) | 415.5k | 760.6k |
| #2 | [ha-mcp](https://index.devtoolwatch.com/tools/homeassistant-ai-ha-mcp/) | 5.4k | 118.1k |
| #3 | [Treg](https://index.devtoolwatch.com/tools/superdesigndev-treg/) | 6.9k | 6.7k |
| #4 | [Chrome DevTools MCP](https://index.devtoolwatch.com/tools/chrome-devtools-mcp/) | 54.6k | 2.7M |
| #5 | [codebase-memory-mcp](https://index.devtoolwatch.com/tools/deusdata-codebase-memory-mcp/) | 47.9k | – |
| #6 | [open-computer-use](https://index.devtoolwatch.com/tools/ifuryst-open-computer-use/) | 2.8k | – |

## Unity MCP FAQ

### Is Unity MCP free and open source?

Yes. Unity MCP's source code is on GitHub (CoplayDev/unity-mcp) under the MIT license, so you can use it for free.

### How do I install Unity MCP?

Run `https://github.com/CoplayDev/unity-mcp.git?path=/MCPForUnity#main`. The install section above has the other options from the project's README.

### Is Unity MCP still maintained?

Yes. The CoplayDev/unity-mcp repository was last updated on Oct 19, 2026, and the latest release, v10.3.0 on GitHub, came out on Oct 4, 2026.

### How popular is Unity MCP?

Unity MCP has 15.6k GitHub stars as of Nov 1, 2026. It gained 226 new stars in the week of Oct 25–31, 2026, against a 12-week average of 205 a week. That made it #7 among MCP servers and agent tools on the Devtoolwatch Board.

### What are the best alternatives to Unity MCP?

Other MCP servers and agent tools on the Devtoolwatch Board in the week of Oct 25–31, 2026, by momentum: REA (#1), ha-mcp (#2), Treg (#3), Chrome DevTools MCP (#4), codebase-memory-mcp (#5). The alternatives table above has their numbers.

### What is Unity MCP?

Unity MCP, also called MCP for Unity, is an open-source Unity Editor package that bridges AI assistants with the Editor via the Model Context Protocol. It gives an LLM tools to manage assets, control scenes, edit scripts, run tests and automate game dev workflows.

### How does Unity MCP work?

Unity MCP uses three layers. An MCP client connects over stdio or HTTP to a Python FastMCP server, which routes requests over WebSocket to a C# plugin inside the Unity Editor. The plugin runs commands through Unity Editor APIs and returns structured results.

### How do I use Unity MCP with Claude Code or Codex?

Unity MCP works with any MCP client, including Claude Code and Codex. Install the package, then use Window → MCP for Unity → Configure All Detected Clients. Codex is supported over stdio only.

### Does Unity MCP work with VS Code?

Unity MCP lists VS Code among supported MCP clients and auto-configures detected clients from the Unity Editor menu.

### Can Unity MCP control several Unity Editors at once?

Unity MCP can route one MCP session to any of several open Unity Editors, with per-call routing for cross-project prompts and session isolation across MCP clients.

### Does Unity MCP need an account or send telemetry?

Unity MCP requires no account and has no telemetry by default, according to its homepage.

## Sources

1. [CoplayDev/unity-mcp on GitHub](https://github.com/CoplayDev/unity-mcp)
2. [Unity MCP README](https://github.com/CoplayDev/unity-mcp/blob/beta/README.md)
3. [Unity MCP website](https://coplaydev.github.io/unity-mcp/)
4. [Release v10.3.0 (Oct 4, 2026)](https://github.com/CoplayDev/unity-mcp/releases/tag/v10.3.0)
5. [Release v10.2.0 (Sep 1, 2026)](https://github.com/CoplayDev/unity-mcp/releases/tag/v10.2.0)
6. [Release v10.1.2 (Aug 2, 2026)](https://github.com/CoplayDev/unity-mcp/releases/tag/v10.1.2)
7. [Devtoolwatch Board, the week of Oct 25–31, 2026](https://index.devtoolwatch.com/)