Stealth Browser MCP

Undetectable browser automation for MCP-compatible AI agents.

Bypass Cloudflare, antibot systems, and social media blocks with real browser instances powered by nodriver + Chrome DevTools Protocol + FastMCP.

Demo

Stealth Browser MCP bypassing Cloudflare, cloning UI elements, and intercepting network traffic — all through AI chat commands.

Features

Antibot bypass — Works on Cloudflare, Queue-It, and other protection systems that block traditional automation
90 tools across 11 sections — From basic navigation to advanced CDP function execution
Modular loading — Run the full 90-tool arsenal or a minimal 22-tool core; disable what you don't need
Pixel-accurate element cloning — Extract complete elements with all CSS, DOM structure, events, and assets via CDP
Network interception — Inspect every request, response, header, and payload through your AI agent
Dynamic hook system — AI-generated Python functions that intercept and modify network traffic in real-time
Instant text input — Paste large content via CDP or type with human-like keystrokes and newline support
Cross-platform — Windows, macOS, Linux, Docker, and CI/CD pipelines with automatic environment detection
Browser support — Chrome, Chromium, and Microsoft Edge (automatic detection)
Clean MCP integration — No custom brokers or wrappers; works with Claude Code, Claude Desktop, Cursor, and any MCP client

Quickstart

1. Clone and install

git clone https://github.com/vibheksoni/stealth-browser-mcp.git
cd stealth-browser-mcp
python -m venv venv

# Activate virtual environment
# Windows:
venv\Scripts\activate
# Mac/Linux:
source venv/bin/activate

pip install -r requirements.txt

2. Add to your MCP client

Claude Code CLI (recommended):

Windows:

claude mcp add-json stealth-browser-mcp "{\"type\":\"stdio\",\"command\":\"C:\\path\\to\\stealth-browser-mcp\\venv\\Scripts\\python.exe\",\"args\":[\"C:\\path\\to\\stealth-browser-mcp\\src\\server.py\"]}"

Mac/Linux:

claude mcp add-json stealth-browser-mcp '{
  "type": "stdio",
  "command": "/path/to/stealth-browser-mcp/venv/bin/python",
  "args": ["/path/to/stealth-browser-mcp/src/server.py"]
}'

Replace /path/to/stealth-browser-mcp/ with your actual project path.

Manual JSON configuration (Claude Desktop, Cursor, etc.)

Windows (%APPDATA%\Claude\claude_desktop_config.json):

{
  "mcpServers": {
    "stealth-browser-mcp": {
      "command": "C:\\path\\to\\stealth-browser-mcp\\venv\\Scripts\\python.exe",
      "args": ["C:\\path\\to\\stealth-browser-mcp\\src\\server.py"],
      "env": {}
    }
  }
}

Mac/Linux (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "stealth-browser-mcp": {
      "command": "/path/to/stealth-browser-mcp/venv/bin/python",
      "args": ["/path/to/stealth-browser-mcp/src/server.py"],
      "env": {}
    }
  }
}

FastMCP CLI (untested)

pip install fastmcp
fastmcp install claude-desktop src/server.py --with-requirements requirements.txt
# OR
fastmcp install claude-code src/server.py --with-requirements requirements.txt
# OR
fastmcp install cursor src/server.py --with-requirements requirements.txt

3. Test it

Restart your MCP client and ask your agent:

"Use stealth-browser to navigate to https://example.com and take a screenshot."

Modular Architecture

Choose exactly what functionality you need. Run the full 90-tool suite or strip it down to 22 core tools.

Mode	Tools	Use Case
Full (default)	90	Complete browser automation and debugging
Minimal (`--minimal`)	22	Core browser automation only
Custom (`--disable-*`)	Your choice	Disable specific sections

python src/server.py --minimal
python src/server.py --disable-cdp-functions --disable-dynamic-hooks
python src/server.py --list-sections

Available sections:

Section	Tools	Description
`browser-management`	11	Core browser operations
`element-interaction`	11	Page interaction and manipulation
`element-extraction`	9	Element cloning and extraction
`file-extraction`	9	File-based extraction tools
`network-debugging`	5	Network monitoring and interception
`cdp-functions`	13	Chrome DevTools Protocol execution
`progressive-cloning`	10	Advanced element cloning
`cookies-storage`	3	Cookie and storage management
`tabs`	5	Tab management
`debugging`	6	Debug and system tools
`dynamic-hooks`	10	AI-powered network hooks

Toolbox

Browser Management

Tool	Description
`spawn_browser()`	Create undetectable browser instance
`navigate()`	Navigate to URLs
`close_instance()`	Clean shutdown of browser
`list_instances()`	Manage multiple sessions
`get_instance_state()`	Full browser state information
`go_back()`	Navigate back in history
`go_forward()`	Navigate forward in history
`reload_page()`	Reload current page
`hot_reload()`	Reload modules without restart
`reload_status()`	Check module reload status

Element Interaction

Tool	Description
`query_elements()`	Find elements by CSS/XPath
`click_element()`	Natural clicking
`type_text()`	Human-like typing with newline support
`paste_text()`	Instant text pasting via CDP
`scroll_page()`	Natural scrolling
`wait_for_element()`	Smart waiting
`execute_script()`	Run JavaScript
`select_option()`	Dropdown selection
`get_element_state()`	Element properties

Element Extraction (CDP-accurate)

Tool	Description
`extract_complete_element_cdp()`	Complete CDP-based element clone
`clone_element_complete()`	Complete element cloning
`extract_complete_element_to_file()`	Save complete extraction to file
`extract_element_styles()`	300+ CSS properties via CDP
`extract_element_styles_cdp()`	Pure CDP styles extraction
`extract_element_structure()`	Full DOM tree
`extract_element_events()`	React/Vue/framework listeners
`extract_element_animations()`	CSS animations/transitions
`extract_element_assets()`	Images, fonts, videos
`extract_related_files()`	Related CSS/JS files

File-Based Extraction

Tool	Description
`extract_element_styles_to_file()`	Save styles to file
`extract_element_structure_to_file()`	Save structure to file
`extract_element_events_to_file()`	Save events to file
`extract_element_animations_to_file()`	Save animations to file
`extract_element_assets_to_file()`	Save assets to file
`clone_element_to_file()`	Save complete clone to file
`list_clone_files()`	List saved clone files
`cleanup_clone_files()`	Clean up old clone files

Network Debugging and Interception

Tool	Description
`list_network_requests()`	List captured network requests
`get_request_details()`	Inspect headers and payload for a request
`get_response_content()`	Get response data from a request
`modify_headers()`	Add custom headers to requests
`spawn_browser(block_resources=[...])`	Block tracking scripts, ads, etc.
`create_dynamic_hook()`	Create Python functions to intercept/modify requests
`create_simple_dynamic_hook()`	Quick hook creation with presets
`list_dynamic_hooks()`	List active hooks with statistics
`get_dynamic_hook_details()`	Inspect hook source code
`remove_dynamic_hook()`	Remove a hook
`get_hook_documentation()`	Request object structure and HookAction types
`get_hook_examples()`	10 detailed examples: blockers, redirects, proxies
`get_hook_requirements_documentation()`	Pattern matching and best practices
`get_hook_common_patterns()`	Ad blocking, API proxying, auth injection
`validate_hook_function()`	Validate hook code before deployment

CDP Function Execution

Tool	Description
`execute_cdp_command()`	Direct CDP commands (use snake_case)
`discover_global_functions()`	Find JavaScript functions
`discover_object_methods()`	Discover object methods (93+ methods)
`call_javascript_function()`	Execute any function
`inject_and_execute_script()`	Run custom JS code
`inspect_function_signature()`	Inspect function details
`create_persistent_function()`	Functions that survive reloads
`execute_function_sequence()`	Execute function sequences
`create_python_binding()`	Create Python-JS bindings
`execute_python_in_browser()`	Execute Python code via py2js
`get_execution_contexts()`	Get JS execution contexts
`list_cdp_commands()`	List available CDP commands
`get_function_executor_info()`	Get executor state info

Progressive Element Cloning

Tool	Description
`clone_element_progressive()`	Initial lightweight structure
`expand_styles()`	On-demand styles expansion
`expand_events()`	On-demand events expansion
`expand_children()`	Progressive children expansion
`expand_css_rules()`	Expand CSS rules data
`expand_pseudo_elements()`	Expand pseudo-elements
`expand_animations()`	Expand animations data
`list_stored_elements()`	List stored elements
`clear_stored_element()`	Clear specific element
`clear_all_elements()`	Clear all stored elements

Cookie and Storage

Tool	Description
`get_cookies()`	Read cookies
`set_cookie()`	Set cookies
`clear_cookies()`	Clear cookies
`get_instance_state()`	localStorage and sessionStorage snapshot
`execute_script()`	Read/modify storage via JS

Tabs

Tool	Description
`list_tabs()`	List open tabs
`new_tab()`	Create new tab
`switch_tab()`	Change active tab
`close_tab()`	Close tab
`get_active_tab()`	Get current tab

Page Analysis and Debugging

Tool	Description
`take_screenshot()`	Capture screenshots
`get_page_content()`	HTML and metadata
`get_debug_view()`	Debug info with pagination
`clear_debug_view()`	Clear debug logs
`export_debug_logs()`	Export logs (JSON/pickle/gzip)
`get_debug_lock_status()`	Debug lock status
`validate_browser_environment_tool()`	Diagnose platform issues and browser compatibility

Stealth vs Playwright MCP

Feature	Stealth Browser MCP	Playwright MCP
Cloudflare / Queue-It	Consistently bypasses	Commonly blocked
Banking / Gov portals	Works	Frequently blocked
Social media automation	Full automation	Captchas and bans
UI element cloning	CDP-accurate extraction	Limited
Network debugging	Full request/response inspection via AI	Basic
API reverse engineering	Payload inspection through chat	Manual tools only
Dynamic hook system	AI-generated Python functions for real-time interception	Not available
Modular architecture	11 sections, 22–90 tools	Fixed ~20 tools
Total tools	90 (customizable)	~20

Tested on: LinkedIn, Instagram, Twitter/X, Amazon, banking portals, government sites, Cloudflare-protected APIs, Nike SNKRS, Ticketmaster, Supreme.

Troubleshooting

No compatible browser found Install Chrome, Chromium, or Microsoft Edge. The server auto-detects the first available browser. Run validate_browser_environment_tool() to diagnose.

Tools hang or return malformed JSON Debug output was printing to stdout, corrupting the MCP JSON-RPC protocol. This was fixed in #8. Pull the latest master branch.

Browser crashes on Linux / Docker / CI Run with --sandbox=false or ensure your environment supports sandboxing. The server auto-detects root and container environments and adjusts accordingly.

Too many tools cluttering the AI chat Use --minimal for 22 core tools, or selectively disable sections:

python src/server.py --disable-cdp-functions --disable-dynamic-hooks --disable-progressive-cloning

Module not found errors Make sure you activated the virtual environment and installed dependencies:

pip install -r requirements.txt

Examples

Market research — Extract pricing and features from competitors, output a comparison table
UI cloning — Recreate a pricing section with exact fonts, styles, and interactions
Inventory monitoring — Watch a product page and alert when stock changes
API reverse engineering — Intercept requests, map endpoints, and inspect data flow

All driven from a single AI agent conversation.

Showcase

Augment Code hero clone — A user asked Claude to clone the hero section from augmentcode.com. The agent spawned a stealth browser, navigated to the site, extracted the complete element via CDP (styles, structure, assets), and generated a pixel-accurate HTML recreation with responsive design and animations. The entire process took under two minutes of conversation.

View the recreation | Full walkthrough

Roadmap

See the live plan in ROADMAP.md. Contributions welcome.

Contributing

Read CONTRIBUTING.md and open a PR. First-time contributors welcome.

If this project saves you time, star the repo — it helps more than you think.

Support

If this tool saved you time or made you money, consider supporting development:

License

MIT — see LICENSE.

Name		Name	Last commit message	Last commit date
Latest commit History 23 Commits
.github		.github
demo		demo
examples		examples
media		media
src		src
.dockerignore		.dockerignore
.gitignore		.gitignore
CHANGELOG.md		CHANGELOG.md
CODEOWNERS		CODEOWNERS
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
COMPARISON.md		COMPARISON.md
CONTRIBUTING.md		CONTRIBUTING.md
Dockerfile		Dockerfile
HALL_OF_FAME.md		HALL_OF_FAME.md
LICENSE		LICENSE
README.md		README.md
ROADMAP.md		ROADMAP.md
SECURITY.md		SECURITY.md
STEALTH_TESTS.md		STEALTH_TESTS.md
pyproject.toml		pyproject.toml
requirements.txt		requirements.txt
run_server.bat		run_server.bat
run_server.sh		run_server.sh
smithery.yaml		smithery.yaml

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Stealth Browser MCP

Table of Contents

Demo

Features

Quickstart

1. Clone and install

2. Add to your MCP client

3. Test it

Modular Architecture

Toolbox

Stealth vs Playwright MCP

Troubleshooting

Examples

Showcase

Roadmap

Contributing

Support

License

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Stealth Browser MCP

Table of Contents

Demo

Features

Quickstart

1. Clone and install

2. Add to your MCP client

3. Test it

Modular Architecture

Toolbox

Stealth vs Playwright MCP

Troubleshooting

Examples

Showcase

Roadmap

Contributing

Support

License

About

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