@saiden/browse

Headless browser automation via MCP using Playwright WebKit.

Installation

npm install @saiden/browse
npx playwright install webkit

CLI Usage

# Take a screenshot
browse https://example.com

# Custom viewport and output
browse -o page.png -w 1920 -h 1080 https://example.com

# Query elements
browse -q "a[href]" https://example.com
browse -q "img" -j https://example.com  # JSON output

# Click and interact
browse -c "button.submit" https://example.com
browse -t "input[name=q]=hello" -c "button[type=submit]" https://google.com

# Chain actions
browse -c ".cookie-accept" -c "a.nav-link" -q "h1" https://example.com

# Interactive mode (visible browser)
browse -i --headed https://example.com

# Fullscreen mode (macOS native fullscreen)
browse --fullscreen -i https://example.com

# Preview mode (highlights elements before actions)
browse -p -c "button.submit" https://example.com
browse -p --preview-delay 3000 -c ".nav-link" https://example.com

MCP Server

Add to your MCP client config (e.g., ~/.claude/settings.json or project .mcp.json):

{
  "mcpServers": {
    "browse": {
      "command": "npx",
      "args": ["browse-mcp"]
    }
  }
}

Or run directly:

browse-mcp

MCP Tools Reference

Browser Lifecycle:

Tool	Description
launch	Launch browser with options (headed, fullscreen, preview, viewport)
close	Close the browser and end session

Navigation & Interaction:

Tool	Description
goto	Navigate to a URL
click	Click on an element
type	Type text into an input field
hover	Hover over an element
select	Select option(s) in a dropdown
keys	Send keyboard shortcuts (e.g., "Enter", "Control+a")
scroll	Scroll page or element into view
upload	Upload files to a file input
back, forward, reload	Browser navigation
wait	Wait for a specified time

Debugging & Inspection:

Tool	Description
console	Get captured console messages (log, warn, error, etc.)
errors	Get page errors (uncaught exceptions)
network	Get captured network requests/responses
intercept	Block or mock network requests
metrics	Get performance metrics and DOM statistics
a11y	Get accessibility tree snapshot

Page Content:

Tool	Description
query	Query elements by CSS selector
screenshot	Take a screenshot
url	Get current URL and title
html	Get page HTML content
eval	Execute JavaScript in browser context

Storage & Session:

Tool	Description
cookies	Get, set, delete, or clear cookies
storage	Access localStorage or sessionStorage
dialog	Configure how browser dialogs are handled
session_save	Save session state to file
session_restore	Restore session from file

Viewport & Emulation:

Tool	Description
viewport	Resize browser viewport
emulate	Emulate a mobile device

Image Processing:

Tool	Description
favicon	Generate favicon set from image
convert	Convert image format
resize	Resize image
crop	Crop image
compress	Compress image
thumbnail	Create thumbnail

MCP Resources

Resource	Description
browser://state	Browser state (URL, title, launched)
browser://html	Page HTML (truncated to 10KB)
browser://html/full	Complete page HTML
browser://console	Captured console messages
browser://network	All network requests
browser://network/failed	Failed requests only
browser://errors	Page errors
browser://a11y	Accessibility tree
browser://screenshot	Page screenshot as base64 PNG

Programmatic Usage

import { ClaudeBrowser } from '@saiden/browse';

const browser = new ClaudeBrowser({
  headless: true,      // Set false to show browser window
  width: 1280,
  height: 800,
  fullscreen: false,   // macOS native fullscreen (implies headless: false)
  preview: false,      // Highlight elements before actions
  previewDelay: 2000,  // Preview highlight duration in ms
});

await browser.launch();
await browser.goto('https://example.com');

const elements = await browser.query('a[href]');
console.log(elements);

await browser.click('button.submit');
await browser.type('#input', 'hello');
await browser.screenshot('page.png');

await browser.close();

API

ClaudeBrowser

Lifecycle:

• launch() - Launch the browser
• close() - Close the browser
• newPage() - Open new page

Navigation:

• goto(url) - Navigate to URL
• back() / forward() / reload() - Browser navigation
• wait(ms) - Wait for timeout

Interaction:

• click(selector) - Click element
• type(selector, text) - Type into input
• hover(selector) - Hover over element
• select(selector, value) - Select dropdown option(s)
• keys(keys) - Press keyboard keys
• scroll(selector?, x?, y?) - Scroll page or element
• upload(selector, files) - Upload files

Content:

• query(selector) - Query elements, returns attributes
• screenshot(path?, fullPage?) - Take screenshot
• getUrl() - Get current URL and title
• getHtml(full?) - Get page HTML
• eval(script) - Execute JavaScript

Debugging:

• getConsole(level?, clear?) - Get console messages
• getErrors(clear?) - Get page errors
• getNetwork(filter?, clear?) - Get network requests
• getMetrics(includeResources?) - Get performance metrics
• getA11y(selector?) - Get accessibility tree

Storage:

• getCookies(name?) - Get cookies
• setCookie(name, value, url?) - Set cookie
• deleteCookie(name) / clearCookies() - Remove cookies
• getStorage(type, key?) - Get localStorage/sessionStorage
• setStorage(type, key, value) - Set storage item
• deleteStorage(type, key) / clearStorage(type) - Remove storage

Interception:

• addIntercept(pattern, action, response?) - Block or mock requests
• clearIntercepts() - Remove all intercepts

Viewport:

• setViewport(width, height) - Resize viewport
• emulate(device) - Emulate device (e.g., 'iPhone 13')

Commands:

• executeCommand(cmd) - Execute a command object

License

MIT