screenshot-mcp
Captures full-monitor screenshots and returns them as base64 inline or saved file. Supports macOS, Linux, Windows, and WSL2.
README
screenshot-mcp
An MCP server that captures full-monitor screenshots and returns them inline (base64) or as a saved file. Supports macOS, native Linux (X11 and Wayland), native Windows, and WSL2.
Tools
list_monitors
Lists all connected monitors with their index, resolution, and primary status. Call this first to find monitor indices.
take_screenshot
Captures a screenshot of one monitor.
| Argument | Type | Default | Description |
|---|---|---|---|
monitor |
integer | 0 |
Monitor index from list_monitors |
return |
"inline" | "path" |
"inline" |
inline = base64 PNG in response (Claude sees it); path = save to disk, return the file path |
path |
string | temp file | Output path. Only used when return="path" |
Tip: Very high-res monitors (4K, 5K) produce large base64 blobs. If you hit context limits, switch to
return="path"and use theReadtool to view the file.
Installation
git clone https://github.com/you/screenshot-mcp
cd screenshot-mcp
npm install
npm run build
Platform requirements
| Platform | Requirement |
|---|---|
| macOS | Nothing extra — uses screencapture and system_profiler (built in) |
| Native Linux / X11 | scrot or imagemagick: sudo apt install scrot |
| Native Linux / Wayland | grim + wlr-randr: sudo apt install grim wlr-randr |
| Native Windows | Nothing extra — uses PowerShell + System.Drawing |
| WSL2 | Nothing extra — shells out to powershell.exe on the Windows side |
Configure in Claude Code
claude mcp add screenshot node /absolute/path/to/screenshot-mcp/dist/index.js
Configure in Claude Desktop
Add to claude_desktop_config.json:
{
"mcpServers": {
"screenshot": {
"command": "node",
"args": ["/absolute/path/to/screenshot-mcp/dist/index.js"]
}
}
}
How WSL2 works
WSL2 doesn't have direct access to the Windows display. This server detects WSL (via /proc/version or WSL_DISTRO_NAME) and shells out to powershell.exe to run a capture script using System.Windows.Forms.Screen and System.Drawing. The PNG is written to the Linux /tmp filesystem via the \\wsl.localhost\... UNC path and then read back.
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