Desktop MCP Server

Windows 11 desktop automation MCP server. Win32, UIA, CDP/Chrome, 56 tools. Windows-only.

The short version

32 tools, native Rust engine (UIA in 2 ms), zero-config PowerShell fallback, full CJK support, MIT licensed. Add the snippet above to your Claude / Cursor / VS Code Copilot config and Claude can drive Notepad, Excel, Chrome, Windows Terminal, and any other app on your machine.

• LLM-native design — — Built around how LLMs think, not how humans click. run_macro batches multiple operations into a single API call; diffMode sends only the windows that changed since the last frame. Minimal tokens, minimal round-trips
• Full CJK support — — Uses Win32 GetWindowTextW for window titles, avoiding nut-js garbling. IME bypass input supported for Japanese/Chinese/Korean environments
• 3-tier token reduction — — detail="image" (~443 tok) / detail="text" (~100–300 tok) / diffMode=true (~160 tok). Send pixels only when you actually need to see them
• 1:1 coordinate mode — — dotByDot=true captures at native resolution (WebP). Image pixel = screen coordinate — no scale math needed. With origin+scale passed to mouse_click, the server converts coords for you — eliminating off-by-one / scale bugs
• Chromium smart fallback — — detail="text" on Chrome/Edge/Brave auto-skips UIA (prohibitively slow there) and runs Windows OCR. hints.chromiumGuard + hints.ocrFallbackFired flag the path taken
• UIA element extraction — — detail="text" returns button names and clickAt coords as JSON. Claude can click the right element without ever looking at a screenshot

What it needs from you

| | | |---|---| | OS | Windows 10 / 11 (64-bit) | | Node.js | v20+ recommended (tested on v22+) | | PowerShell | 5.1+ (bundled with Windows) — used only as fallback when the Rust native engine is unavailable | | Claude CLI | claude command must be available | > Note: nut-js native bindings require the Visual C++ Redistributable. > Download from

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