webclaw

Overview

WebClaw operates as a Chrome extension that maintains full access to logged-in sessions and user browser data. It provides 21 MCP tools for browser automation, including navigation, page interaction, and tab management. The system uses a compact accessibility tree with @ref labels for precise element targeting, avoiding the pitfalls of headless browsers and bot detection. The server communicates with the Chrome extension via WebSocket, enabling real-time browser control from any MCP client like Claude Desktop, Cursor, or VS Code.

Try asking AI

After installing, here are 5 things you can ask your AI assistant:

• navigate_tourl, tabId?

  Navigate to a URL

  Try:Go to wikipedia.orgTry:Visit https://example.com
• page_snapshotfocusRegion?, interactiveOnly?, tabId?

  Get a compact accessibility tree with @ref labels

  Try:Show me the current page structureTry:What interactive elements are on the page?
• clickref, snapshotId, tabId?

  Click an element by its @ref label

  Try:Click the search buttonTry:Press the submit form button
• type_textref, text, snapshotId, clearFirst?, tabId?

  Type text into an input/textarea by @ref

  Try:Enter 'Model Context Protocol' in the search boxTry:Fill out the username field
• new_taburl?

  Open a new tab (optionally with a URL)

  Try:Open a new tabTry:Create a new tab for google.com
• list_tabs

  List all open tabs with tabId, URL, title, and active state

  Try:Show me all open tabsTry:List my current browser tabs
• switch_tabtabId

  Switch to a specific tab

  Try:Switch to tab with ID 2Try:Activate the first tab
• go_backtabId?

  Go back to the previous page

  Try:Go back to the previous pageTry:Navigate backwards
• reloadtabId?, bypassCache?

  Reload the current page

  Try:Refresh the pageTry:Reload the current tab
• screenshottabId?

  Capture the visible area of the active tab

  Try:Take a screenshotTry:Capture the current page view
• list_webmcp_toolstabId?

  Discover tools on the page (native WebMCP + auto-synthesized from buttons/forms)

  Try:What tools are available on this page?Try:List page-declared tools
• invoke_webmcp_tooltoolName, args?, tabId?

  Invoke a discovered tool (native or synthesized)

  Try:Use the submitForm toolTry:Invoke the calculateTotal tool

Comparable tools

Installation

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

# Claude Code
claude mcp add webclaw -- npx -y webclaw-mcp

# Cursor / VS Code / Windsurf
# Add to respective MCP config files:
{
  "mcpServers": {
    "webclaw": {
      "command": "npx",
      "args": ["-y", "webclaw-mcp"]
    }
  }
}

FAQ

How does WebClaw avoid bot detection?

WebClaw runs as a Chrome extension in a real browser, maintaining normal cookies, user agents, and browser fingerprints, making it significantly more resistant to bot detection compared to headless browsers.

Can it access logged-in sessions?

Yes, since it runs inside your real Chrome, WebClaw has access to all your logged-in sessions, cookies, and browser data without needing to re-authenticate.

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