v0.1.0 — Screen MCP Overlay

A desktop overlay that lets Claude Code — or any MCP client — see your screen and draw on it.

Ask "how do I export this?" and the agent looks at your screen, then circles the button and numbers
the steps directly on your desktop. It does not control your mouse or keyboard — it sees and it
points; you stay in control.

Install

Download ScreenMcpOverlay-Setup-0.1.0.exe below and run it. The app appears in your system tray.

The build is unsigned, so Windows SmartScreen warns on first run — click More info → Run anyway.

Prefer no installer? Take ScreenMcpOverlay-Portable-0.1.0.exe instead: one self-contained file that
installs nothing.

Then right-click the tray icon → Copy MCP URL, and register it with your agent:

claude mcp add --transport http screen-overlay "PASTE_THE_URL_HERE" --scope user

Full instructions, including the VS Code extension, are in the
README.

What's in it

• 14 MCP tools — capture, annotate, UI Automation tree queries, OCR, waits, focus and scroll.
• Anchored drawings that follow their target when a window moves, resizes or relayouts.
• Cheap before expensive — describe_window reads a window's controls as text, measured ~3.6x
  cheaper than a screenshot of the same window, and every line can be pointed at directly.
• Z-order-correct window capture — asking for a covered window renders that window, not whatever
  happens to be drawn on top of it.
• Invisible to screen capture, so the overlay's own drawings never contaminate the next
  screenshot or your screen share.
• Any MCP client, several at once — the CLI, the VS Code extension, Cursor and Codex all connect
  to the same HTTP endpoint and drive the same screen.

Privacy

Everything stays local. Screenshots go to a temp folder and are deleted on exit, there's no
telemetry, and the server listens on loopback behind an access token, refuses requests carrying an
Origin, and has DNS-rebinding protection — a web page cannot reach it and read your screen. Every
capture posts a line into the overlay panel, so a screen read is never silent.

Notes

• Windows 10 (2004+) or Windows 11. WDA_EXCLUDEFROMCAPTURE is Windows-only.
• The built-in chat panel needs the Claude Agent SDK, which is proprietary and therefore not
  bundled. Run the app from source if you want the panel; everything else is identical.
• Qt/QML accessibility coverage is untested. describe_window will tell you which fallback you need.

Licensed Apache-2.0.
Third-party components are listed in
NOTICE.
Claude and Claude Code are trademarks of Anthropic PBC; this project is not affiliated with or
endorsed by Anthropic.

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SHA-256

96268b8e9ac51f5fb568d4afc9cf8462f54b9c267bfcf49e49f03fafd9b59e14  ScreenMcpOverlay-Setup-0.1.0.exe
257101340aefa876652214de19d988b130644ca7f318b6bfe22e861a9152c845  ScreenMcpOverlay-Portable-0.1.0.exe