agentic-stealth-browser 1.0.0

Production-grade, human-mimicking browser automation framework for autonomous agents. Survives modern anti-bot systems.

Agentic Stealth Browser

A Python framework that makes browser automation look human. Built for autonomous agents that need to navigate websites protected by Cloudflare, LinkedIn, Amazon, and other anti-bot systems.

Why This Exists

Standard browser automation (page.goto(), page.click()) gets detected instantly. This framework solves that by combining:

• TLS fingerprint spoofing — matches real browser TLS handshakes
• Human behavior simulation — natural mouse, typing, scrolling with realistic imperfections
• Automatic recovery — detects blocks (CAPTCHAs, rate limits) and recovers without crashing
• Account lifecycle management — warming, health scoring, cooling off

Installation

pip install agentic-stealth-browser
playwright install --with-deps chromium

Quick Start

from core.agent_browser import AgentBrowser
import asyncio

async def main():
    browser = AgentBrowser(session_name="demo")
    await browser.launch(headless=True)

    # This handles stealth, human behavior, and recovery automatically
    await browser.safe_goto("https://example.com")

    # Add human-like actions
    await browser.human.scroll_naturally(400)
    await browser.human.think(1500, 2800)

    await browser.close()

asyncio.run(main())

Real-World Example

For protected sites, load real cookies and use a platform preset:

browser = AgentBrowser(session_name="linkedin")
await browser.launch(preset="linkedin_2026")
await browser.load_cookies_from_file("cookies.json")
await browser.warm_up_before_work(intensity="heavy")
await browser.safe_goto("https://www.linkedin.com/feed/", platform="linkedin")

The flow: cookies → warm-up → navigate → recover if blocked → act human.

How It Works

AgentBrowser
├── Stealth      → TLS profiles, canvas/WebGL spoofing, WebRTC isolation
├── Behavior     → Bézier mouse, natural typing, distraction simulation
├── Recovery     → Detects blocks → rotates proxy/session → retries
├── Accounts     → Health scoring, 14-day warming, session checkpointing
└── Proxy        → Residential proxy with rotation and health tracking

Key Features

Feature	What It Does
TLS Fingerprinting	Region-specific profiles (US, Japan, EU, Korea) with JA3/JA4 support
Human Behavior	Mouse with wobble, typing with mistakes, variable scrolling, fatigue
Auto Recovery	Detects CAPTCHAs, rate limits, blocks — recovers automatically
Account Warming	14-day gradual ramp-up so new accounts don't get flagged
Session Checkpoints	Export/import browser state for cross-host migration
Platform Presets	Pre-configured profiles for LinkedIn, Amazon, Cloudflare
MCP Server	Integration with AI agents via Model Context Protocol

MCP Setup

Use this framework with AI agents (Claude Desktop, Cursor, Windsurf, etc.) via MCP.

1. Install the MCP Server

pip install agentic-stealth-browser

2. Configure Your MCP Client

Claude Desktop — Add to claude_desktop_config.json:

{
  "mcpServers": {
    "stealth-browser": {
      "command": "python",
      "args": ["-m", "production.mcp_server"],
      "env": {}
    }
  }
}

Cursor / Windsurf — Add to .cursorrules or MCP settings:

{
  "mcpServers": {
    "stealth-browser": {
      "command": "python",
      "args": ["-m", "production.mcp_server"]
    }
  }
}

3. Available MCP Tools

Tool	Description
stealth_launch	Launch browser with stealth + region preset
stealth_navigate	Navigate with full recovery and human behavior
stealth_load_cookies	Load cookies from real browser
stealth_set_region	Switch TLS fingerprint region (US, Japan, EU, Korea)
stealth_scrape	Navigate and extract page content
stealth_status	Check browser health and session state
stealth_tabs_list	List open tabs/pages and active tab metadata
stealth_tab_snapshot	Capture screenshot + metadata for a specific tab/page
stealth_session_timeline	Fetch replay/timeline events for debugging and recovery analysis
stealth_debug_report	Return full debug report payload for current session
stealth_close	Close browser and cleanup
stealth_capabilities	Show MCP server/runtime version and available tools

4. MCP Server Environment Variables

Variable	Description	Default
STEALTH_MCP_ALLOWED_DIRS	Extra allowed directories for MCP file-access policy (comma/semicolon separated)	(empty)
STEALTH_MCP_SNAPSHOT_DIR	Snapshot output root for stealth_tab_snapshot	~/.agentic-browser/mcp_snapshots
STEALTH_MCP_SNAPSHOT_MAX_PER_SESSION	Max screenshots retained per session directory (older files are pruned)	20
STEALTH_MCP_TIMELINE_DEFAULT_LIMIT	Default event limit when stealth_session_timeline is called without limit	30
STEALTH_MCP_TIMELINE_MAX_LIMIT	Hard upper bound for stealth_session_timeline.limit	200
STEALTH_MCP_OBSERVABILITY_MAX_CHARS	Max serialized response size for observability payloads before truncation	50000

Operator Guide: For detailed workflows on observing what the MCP-driven browser is actually doing (tabs, snapshots, timelines, debug reports, security notes, CDP fallbacks), see docs/MCP_BROWSER_OBSERVABILITY.md.

Configuration

Environment Variables

Variable	Description	Default
STEALTH_REGION	TLS fingerprint region	japan
STEALTH_HEADLESS	Run browser headless	true
STEALTH_PROXY	Use residential proxy	false

Platform Presets

await browser.launch(preset="linkedin_2026")   # LinkedIn
await browser.launch(preset="amazon_2026")     # Amazon
await browser.launch(preset="cloudflare")      # Cloudflare-protected sites

Project Structure

agentic-stealth-browser/
├── core/           # AgentBrowser main class
├── stealth/        # TLS fingerprinting, script injection, caching
├── behavior/       # Human-like mouse, typing, scrolling, personas
├── recovery/       # Block detection, anti-block orchestrator
├── proxy/          # Proxy management and rotation
├── sessions/       # Session and cookie management
├── audit/          # Structured logging and audit trails
├── ai/             # AI hooks and content analysis
├── production/     # CLI, Docker, rate limiting, metrics
├── linkedin/       # LinkedIn-specific actions
├── scraping/       # Safe page scraping utilities
├── docs/           # Architecture Decision Records and guides
└── tests/          # 493 tests across 23 files

Documentation

• Architecture Decision Records
• Visual Debugging Guide
• Stealth Limitations
• Threat Model
• Common Pitfalls
• Rate Limiting & Backoff
• Cookie & Session Resilience

Security

See SECURITY.md for vulnerability reporting and best practices.

Responsible Use

This framework is designed for legitimate automation use cases such as:

• Testing your own applications and infrastructure
• Automating workflows on platforms that permit automation
• Research and security analysis
• Accessibility testing

Important: Many websites (including LinkedIn, Amazon, and others) prohibit automated access in their Terms of Service. Always:

1. Review the target site's Terms of Service and robots.txt
2. Obtain proper authorization before automating access
3. Respect rate limits and avoid causing harm to services
4. Use this tool responsibly and legally

This project is provided as-is under the MIT License. Users are responsible for complying with applicable laws and terms of service.

Contributing

See CONTRIBUTING.md for guidelines.

License

MIT License. See LICENSE for details.