unity-mcp/Server
Marcus Sanatan 7f44e4b53e
Add CLI (#606)
* feat: Add CLI for Unity MCP server

- Add click-based CLI with 15+ command groups
- Commands: gameobject, component, scene, asset, script, editor, prefab, material, lighting, ui, audio, animation, code
- HTTP transport to communicate with Unity via MCP server
- Output formats: text, json, table
- Configuration via environment variables or CLI options
- Comprehensive usage guide and unit tests

* Update based on AI feedback

* Fixes main.py error

* Update for further error fix

* Update based on AI

* Update script.py

* Update with better coverage and Tool Readme

* Log a message with implicit URI changes

Small update for #542

* Minor fixes (#602)

* Log a message with implicit URI changes

Small update for #542

* Log a message with implicit URI changes

Small update for #542

* Add helper scripts to update forks

* fix: improve HTTP Local URL validation UX and styling specificity

- Rename CSS class from generic "error" to "http-local-url-error" for better specificity
- Rename "invalid-url" class to "http-local-invalid-url" for clarity
- Disable httpServerCommandField when URL is invalid or transport not HTTP Local
- Clear field value and tooltip when showing validation errors
- Ensure field is re-enabled when URL becomes valid

* Docker mcp gateway (#603)

* Log a message with implicit URI changes

Small update for #542

* Update docker container to default to stdio

Replaces #541

* fix: Rider config path and add MCP registry manifest (#604)

- Fix RiderConfigurator to use correct GitHub Copilot config path:
  - Windows: %LOCALAPPDATA%\github-copilot\intellij\mcp.json
  - macOS: ~/Library/Application Support/github-copilot/intellij/mcp.json
  - Linux: ~/.config/github-copilot/intellij/mcp.json
- Add mcp.json for GitHub MCP Registry support:
  - Enables users to install via coplaydev/unity-mcp
  - Uses uvx with mcpforunityserver from PyPI

* Use click.echo instead of print statements

* Standardize whitespace

* Minor tweak in docs

* Use `wait` params

* Unrelated but project scoped tools should be off by default

* Update lock file

* Whitespace cleanup

* Update custom_tool_service.py to skip global registration for any tool name that already exists as a built‑in.

* Avoid silently falling back to the first Unity session when a specific unity_instance was requested but not found.

If a client passes a unity_instance that doesn’t match any session, this code will still route the command to the first available session, which can send commands to the wrong project in multi‑instance environments. Instead, when a unity_instance is provided but no matching session_id is found, return an error (e.g. 400/404 with "Unity instance '' not found") and only default to the first session when no unity_instance was specified.

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

* Update docs/CLI_USAGE.md

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

* Updated the CLI command registration to only swallow missing optional modules and to surface real import-time failures, so broken command modules don’t get silently ignored.

* Sorted __all__ alphabetically to satisfy RUF022 in __init__.py.

* Validate --params is a JSON object before merging.

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

---------

Co-authored-by: Shutong Wu <51266340+Scriptwonder@users.noreply.github.com>
Co-authored-by: dsarno <david@lighthaus.us>
Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
2026-01-21 20:53:13 -04:00
..
src Add CLI (#606) 2026-01-21 20:53:13 -04:00
tests Add CLI (#606) 2026-01-21 20:53:13 -04:00
DOCKER_OVERVIEW.md Publish to Docker Hub (#468) 2025-12-19 17:24:04 -04:00
Dockerfile Docker mcp gateway (#603) 2026-01-21 16:00:11 -04:00
LICENSE Publish to pypi (#466) 2025-12-19 16:43:44 -04:00
README.md chore: bump version to 9.0.8 2026-01-19 14:07:05 +00:00
__init__.py Copy the MCP server to the top level (#354) 2025-10-25 00:53:53 -04:00
pyproject.toml Add CLI (#606) 2026-01-21 20:53:13 -04:00
pyrightconfig.json Copy the MCP server to the top level (#354) 2025-10-25 00:53:53 -04:00
uv.lock Add CLI (#606) 2026-01-21 20:53:13 -04:00

README.md

MCP for Unity Server

MCP python License Discord

Model Context Protocol server for Unity Editor integration. Control Unity through natural language using AI assistants like Claude, Cursor, and more.

Maintained by Coplay - This project is not affiliated with Unity Technologies.

💬 Join our community: Discord Server

Required: Install the Unity MCP Plugin to connect Unity Editor with this MCP server. You also need uvx (requires uv) to run the server.


Installation

Option 1: PyPI

Install and run directly from PyPI using uvx.

Run Server (HTTP):

uvx --from mcpforunityserver mcp-for-unity --transport http --http-url http://localhost:8080

MCP Client Configuration (HTTP):

{
  "mcpServers": {
    "UnityMCP": {
      "url": "http://localhost:8080/mcp"
    }
  }
}

MCP Client Configuration (stdio):

{
  "mcpServers": {
    "UnityMCP": {
      "command": "uvx",
      "args": [
        "--from",
        "mcpforunityserver",
        "mcp-for-unity",
        "--transport",
        "stdio"
      ]
    }
  }
}

Option 2: From GitHub Source

Use this to run the latest released version from the repository. Change the version to main to run the latest unreleased changes from the repository.

{
  "mcpServers": {
    "UnityMCP": {
      "command": "uvx",
      "args": [
        "--from",
        "git+https://github.com/CoplayDev/unity-mcp@v9.0.8#subdirectory=Server",
        "mcp-for-unity",
        "--transport",
        "stdio"
      ]
    }
  }
}

Option 3: Docker

Use Pre-built Image:

docker run -p 8080:8080 msanatan/mcp-for-unity-server:latest --transport http --http-url http://0.0.0.0:8080

Build Locally:

docker build -t unity-mcp-server .
docker run -p 8080:8080 unity-mcp-server --transport http --http-url http://0.0.0.0:8080

Configure your MCP client with "url": "http://localhost:8080/mcp".

Option 4: Local Development

For contributing or modifying the server code:

# Clone the repository
git clone https://github.com/CoplayDev/unity-mcp.git
cd unity-mcp/Server

# Run with uv
uv run src/main.py --transport stdio

Configuration

The server connects to Unity Editor automatically when both are running. No additional configuration needed.

Environment Variables:

  • DISABLE_TELEMETRY=true - Opt out of anonymous usage analytics
  • LOG_LEVEL=DEBUG - Enable detailed logging (default: INFO)

Example Prompts

Once connected, try these commands in your AI assistant:

  • "Create a 3D player controller with WASD movement"
  • "Add a rotating cube to the scene with a red material"
  • "Create a simple platformer level with obstacles"
  • "Generate a shader that creates a holographic effect"
  • "List all GameObjects in the current scene"

Documentation

For complete documentation, troubleshooting, and advanced usage:

📖 Full Documentation


Requirements

  • Python: 3.10 or newer
  • Unity Editor: 2021.3 LTS or newer
  • uv: Python package manager (Installation Guide)

License

MIT License - See LICENSE