Safari Screenshot

A Node.js MCP Server for capturing screenshots using Safari on macOS.

Features

Capture window screenshots at specific sizes
Support for different zoom levels
Configurable wait times for page load
Clean up after capture
Native macOS screenshot quality

Usage

import { takeScreenshot } from './screenshot.js';

// Basic window screenshot
await takeScreenshot({
	url: 'https://www.apple.com',
	outputPath: './screenshot.png',
	width: 1024, // Optional: window width (default: 1024)
	height: 768, // Optional: window height (default: 768)
	waitTime: 3, // Optional: seconds to wait for load (default: 3)
	zoomLevel: 1, // Optional: page zoom level (default: 1)
});

// Responsive design testing
await takeScreenshot({
	url: 'https://www.apple.com',
	outputPath: './mobile.png',
	width: 375, // iPhone SE width
	height: 667, // iPhone SE height
	zoomLevel: 1,
});

// High-resolution capture
await takeScreenshot({
	url: 'https://www.apple.com',
	outputPath: './desktop-hd.png',
	width: 1920, // Full HD width
	height: 1080, // Full HD height
	waitTime: 5, // Wait longer for HD content
	zoomLevel: 0.8, // Zoom out slightly
});

Requirements

macOS
Safari
Node.js >= 14.0.0
Terminal needs Accessibility permissions (System Preferences → Security & Privacy → Privacy → Accessibility)

Installation

npm install safari-screenshot

Options

Option	Type	Default	Description
url	string	required	The URL to capture
outputPath	string	auto	Where to save the screenshot (default: ./screenshots/[hostname]-[timestamp].png)
width	number	1024	Window width in pixels
height	number	768	Window height in pixels
waitTime	number	3	Seconds to wait for page load
zoomLevel	number	1	Page zoom level (1 = 100%)

Common Viewport Sizes

The module is tested with these common viewport sizes:

Desktop: 1920×1080 (Full HD)
Laptop: 1366×768
Tablet Landscape: 1024×768
Tablet Portrait: 768×1024
Mobile Large: 428×926 (iPhone 12 Pro Max)
Mobile Medium: 390×844 (iPhone 12 Pro)
Mobile Small: 375×667 (iPhone SE)

How It Works

Opens Safari with specified window size
Loads the URL and waits for page load
Applies zoom level if specified
Uses native macOS screencapture for pixel-perfect results
Verifies screenshot was captured successfully
Cleans up Safari windows

Permissions

This package requires System Events permissions to work:

Open System Preferences > Security & Privacy > Privacy > Accessibility
Add Terminal (or your IDE) to the list of allowed apps

Using with Cursor

Setup in Cursor

Open Cursor
Go to settings, "Add MCP Server"
In the configuration dialog:
- Name: safari-screenshot
- Type: command
- Command: npx -y @rogerheykoop/mcp-safari-screenshot
Or for local development:
- Command: npx -y /path/to/mcp-safari-screenshot/server.js

Example Commands

After connecting to the server in Cursor, you can use these commands:

Take a screenshot of https://apple.com at desktop size

Response: Will capture at 1920×1080

Capture https://apple.com on iPhone 12 Pro

Response: Will capture at 390×844

Screenshot github.com at 50% zoom

Response: Will capture with zoomLevel: 0.5

Supported Parameters

The MCP server understands these concepts:

Device names (e.g., "iPhone", "iPad", "desktop")
Dimensions (e.g., "1024x768")
Zoom levels (e.g., "50% zoom", "2x zoom")
Wait times (e.g., "wait 5 seconds")

Example Workflows

Responsive Testing
Take screenshots of apple.com on iPhone, iPad, and desktop
Zoom Testing
Capture github.com at 75% zoom and 125% zoom
Custom Size
Screenshot example.com at 1440x900

Tips

Screenshots are saved to the screenshots directory by default
Device names automatically set appropriate dimensions
The server handles cleanup of Safari windows
Use "wait X seconds" for slow-loading pages

Troubleshooting

If you encounter issues:

Check Terminal has Accessibility permissions
Verify Safari is not in private browsing mode
Ensure the working directory is writable
Check Cursor's console for error messages

License

MIT

Testing Locally

You can test the MCP implementation directly:

# Test discovery
echo '{"type":"discover"}' | npx -y ./server.js

# Test screenshot
echo '{"type":"execute","tool":"take_screenshot","input":"Take a screenshot of https://apple.com","requestId":"123"}' | npx -y ./server.js

Expected responses:

Discover will return capabilities
Execute will:
- Log progress to stderr
- Return result JSON to stdout
- Save screenshot to ./screenshots/