MCP Window Vision

A small, cross-platform MCP server (macOS / Windows / Linux) that gives an AI assistant eyes on your screen and access to Unity's Console log — so an agent working on a GUI app (like a Unity project) can see the result and read the errors itself, instead of asking you to screenshot and paste.

Screenshots use mss + Pillow (both cross-platform). The MCP transport is pure standard library. Runs on Python 3.9+.

Tools

Requirements

• macOS, Windows, or Linux (Linux capture needs X11)
• Python 3.9+
• macOS only: Screen Recording permission for whatever process launches the server (your terminal / MCP client): System Settings → Privacy & Security → Screen Recording.

Unity Editor.log is found automatically per-OS:

Install

pip install mcp-window-vision

This installs the mcp-window-vision console command.

Verify screen capture works (and that permission is granted):

mcp-window-vision --selftest
# -> "capture OK — NNNNN base64 chars"

Use with Claude Code

User scope (available in every project):

claude mcp add window-vision --scope user -- mcp-window-vision

…or per-project via a .mcp.json at the project root:

{
  "mcpServers": {
    "window-vision": {
      "type": "stdio",
      "command": "mcp-window-vision"
    }
  }
}

Restart the session so the client picks up the server. (Before publishing/installing, you can point command at python3 with args: ["/path/to/src/mcp_window_vision/server.py"].)

Develop

git clone https://github.com/opieeipo/MCPWindowVision
cd MCPWindowVision
pip install -e .
mcp-window-vision --selftest

Roadmap

• v0.1: macOS screen/region capture + Unity log reading.
• v0.2 (current): cross-platform (macOS / Windows / Linux) via mss + Pillow.
• next: a Unity-side C# bridge for live editor control (run menu items, inspect serialized references, enter/exit Play) — closing the loop fully.

License

MIT