capmonster-mcp-patchright: Stealth Browser MCP Server for AI Agents

Building an AI agent that has to work on anti-bot protected sites? Pair this stealth browser with the CapMonster Cloud MCP server, a cost-effective capsolver alternative and 2captcha alternative: reCAPTCHA v3 starts at $0.90 per 1,000 solves, which is up to 38% cheaper than 2Captcha and 10% cheaper than Capsolver. See the pairing example and the comparison below.

Stealth browser MCP server for AI agents — 66 tools, Patchright-powered, reduced CDP automation signals.

Built for automation on sites protected by Cloudflare, Akamai, Kasada and DataDome. When the page shows a CAPTCHA, pair it with the CapMonster Cloud MCP server: this server drives the browser, CapMonster Cloud solves the CAPTCHA. Use the 66 browser_* tools for AI-agent web scraping and browser automation with Claude, GPT and other MCP clients, powered by Patchright, a patched Playwright with reduced automation signals. Learn more

👉 Get your CapMonster Cloud API Key

Fork of mcp-patchright that adds a per-call world: "main" option to browser_evaluate / browser_run_code_unsafe, so page-defined window globals are visible and callable. Defaults to Patchright's isolated stealth world (matching upstream); opt into main only when a page's own script needs to see or be called by your evaluated code. Everything else matches upstream mcp-patchright.

Why Patchright, not Playwright?

See the full comparison for details.

Quick start

npm i -g capmonster-mcp-patchright
capmonster-mcp-patchright --port 9321 --host 127.0.0.1

With Claude / GPT / agents

{
  "mcpServers": {
    "patchright": {
      "command": "npx",
      "args": ["capmonster-mcp-patchright", "--port", "9321", "--host", "127.0.0.1"]
    }
  }
}

🔗 Pair with CapMonster Cloud MCP for captcha solving

This server drives the browser; the CapMonster Cloud MCP server solves the CAPTCHA and the agent injects the token back into the page. Add both servers to your MCP client config:

{
  "mcpServers": {
    "patchright": {
      "command": "npx",
      "args": ["capmonster-mcp-patchright", "--port", "9321", "--host", "127.0.0.1"]
    },
    "capmonster": {
      "command": "uvx",
      "args": ["capmonster-mcp"],
      "env": {
        "CM_API_KEY": "your_api_key_here"
      }
    }
  }
}

Get your key from the CapMonster Cloud Dashboard.

Captcha solving MCP servers compared

| Parameter | CapMonster Cloud MCP | CapSolver MCP | 2Captcha mcp

... View full README on GitHub