Stealth Browser MCP Server: Setup for Claude, Cursor and Other Apps

• Opens a stealth Chrome window

  Starts a new Chrome, Chromium or Edge window that is set up to look like a normal person's browser, and returns its ID.

  Try: “Open a stealth browser.”

  Write · spawn_browser

• Lists your open browser windows

  Shows every browser session this server has started.

  Try: “Which browsers are open?”

  Read · list_instances

• Closes a browser window

  Shuts a browser session down cleanly.

  Try: “Close the browser.”

  Write · close_instance

• Shows the state of a browser

  Returns details about one browser session, such as its tabs and settings.

  Try: “What is the state of this browser?”

  Read · get_instance_state

• Goes to a web address

  Loads a URL in the current tab.

  Try: “Open https://example.com.”

  Network · navigate

• Goes back one page

  Moves the tab back in its history.

  Try: “Go back.”

  Network · go_back

• Goes forward one page

  Moves the tab forward in its history.

  Try: “Go forward.”

  Network · go_forward

• Reloads the page

  Refreshes the current page.

  Try: “Reload the page.”

  Network · reload_page

• Finds elements on the page

  Looks up elements by CSS selector or XPath and returns what it finds.

  Try: “Find all the buttons on this page.”

  Network · query_elements

• Clicks something on the page

  Clicks the element you point to, which can submit forms or trigger actions.

  Try: “Click the login button.”

  Write · click_element

• Types text like a person

  Types into a field with human-like timing and supports new lines.

  Try: “Type my search term into the box.”

  Write · type_text

• Pastes text instantly

  Puts text into a field at once instead of typing it.

  Try: “Paste this address into the field.”

  Write · paste_text

• Presses a keyboard key

  Sends a real key press such as Enter, Tab, arrows or shortcuts.

  Try: “Press Enter.”

  Write · press_key

• Uploads a local file to a form

  Attaches a file from an allowed folder on your computer to a file input on the page.

  Try: “Upload report.pdf to the form.”

  Write · file_upload

• Chooses a dropdown option

  Selects an item in a dropdown.

  Try: “Pick "United States" in the country list.”

  Write · select_option

• Checks an element's state

  Reports whether an element is visible, enabled or checked.

  Try: “Is the submit button enabled?”

  Network · get_element_state

• Waits for something to appear

  Pauses until an element shows up on the page.

  Try: “Wait until the results appear.”

  Network · wait_for_element

• Scrolls the page

  Scrolls in a natural way, for example to load more content.

  Try: “Scroll down to the bottom.”

  Network · scroll_page

• Runs JavaScript on the page

  Runs JavaScript code you give it inside the open page and returns the result.

  Try: “Run a script to get the page title.”

  Runs code · execute_script

• Reads the page text and HTML

  Returns the HTML and text of the current page.

  Try: “Read the page.”

  Network · get_page_content

• Takes a screenshot

  Captures an image of the page.

  Try: “Take a screenshot.”

  Network · take_screenshot

• Lists requests the page made

  Shows the network requests captured so far.

  Try: “What requests did this page make?”

  Network · list_network_requests

• Shows a request's headers and body

  Returns the headers and payload of one captured request.

  Try: “Show the details of that request.”

  Network · get_request_details

• Shows a response's metadata

  Returns the status and headers of a captured response.

  Try: “What did the server answer?”

  Network · get_response_details

• Reads a response body

  Returns the content of a captured response.

  Try: “Show the JSON the API returned.”

  Network · get_response_content

• Searches captured requests

  Finds captured requests that match your search.

  Try: “Find requests to the login API.”

  Network · search_network_requests

• Saves captured network traffic

  Exports captured traffic to a file.

  Try: “Export the traffic to a file.”

  Write · export_network_data

• Loads saved network traffic

  Reads previously exported traffic back in.

  Try: “Import the saved traffic file.”

  Files · import_network_data

• Chooses which traffic to capture

  Sets filters that limit which requests are recorded.

  Try: “Only capture API calls.”

  Write · set_network_capture_filters

• Shows the capture filters

  Returns the filters that are active now.

  Try: “What filters are active?”

  Read · get_network_capture_filters

• Changes request headers

  Adds or replaces headers on requests the browser sends.

  Try: “Add a custom header to all requests.”

  Write · modify_headers

• Reads cookies

  Returns the cookies of the current page, which can include login sessions.

  Try: “Show the cookies for this site.”

  Network · get_cookies

• Sets a cookie

  Adds a cookie to the browser.

  Try: “Set a cookie named theme to dark.”

  Write · set_cookie

• Clears cookies

  Removes cookies from the browser session.

  Try: “Clear all cookies.”

  Delete · clear_cookies

• Shows debug logs

  Returns the server's debug logs and statistics, a page at a time.

  Try: “Show the debug log.”

  Read · get_debug_view

• Clears the debug logs

  Empties the stored debug logs.

  Try: “Clear the debug log.”

  Delete · clear_debug_view

• Saves the debug logs to a file

  Exports logs as JSON, pickle or gzip.

  Try: “Export the debug logs.”

  Write · export_debug_logs

• Checks the debug logger lock

  Reports the state of the debug logger's lock.

  Try: “Is the debug logger locked?”

  Read · get_debug_lock_status

• Reloads server code without restart

  Reloads the server's modules while it keeps running.

  Try: “Hot reload the modules.”

  Runs code · hot_reload

• Checks the module reload status

  Reports how the last module reload went.

  Try: “Did the reload work?”

  Read · reload_status

• Checks if your system can run it

  Diagnoses whether your browser and platform work with the server.

  Try: “Check my browser setup.”

  Read · validate_browser_environment_tool

• Lists open tabs

  Shows the tabs open in a browser.

  Try: “What tabs are open?”

  Read · list_tabs

• Switches to another tab

  Makes another tab the active one.

  Try: “Switch to the second tab.”

  Write · switch_tab

• Closes a tab

  Closes a tab.

  Try: “Close this tab.”

  Write · close_tab

• Shows the active tab

  Returns which tab is active now.

  Try: “Which tab am I on?”

  Read · get_active_tab

• Opens a new tab

  Creates a new tab.

  Try: “Open a new tab.”

  Write · new_tab

• Reads an element's styles

  Returns the computed CSS of an element.

  Try: “Get the styles of the header.”

  Network · extract_element_styles

• Reads an element's structure

  Returns the DOM structure of an element.

  Try: “Get the structure of the nav bar.”

  Network · extract_element_structure

• Reads an element's event listeners

  Lists the event listeners attached to an element.

  Try: “What happens when I click this button?”

  Network · extract_element_events

• Reads an element's animations

  Returns animations and transitions on an element.

  Try: “Get the animations on the hero section.”

  Network · extract_element_animations

• Lists an element's images and fonts

  Returns the images, fonts and videos an element uses.

  Try: “What assets does the banner use?”

  Network · extract_element_assets

• Reads styles through the browser protocol

  Gets computed styles using the browser's debugging protocol only.

  Try: “Get the styles of the card via the protocol.”

  Network · extract_element_styles_cdp

• Finds linked CSS and JavaScript files

  Lists the stylesheet and script files related to an element.

  Try: “Which files style this element?”

  Network · extract_related_files

• Copies an element completely

  Extracts an element with its structure, styles, events and assets so it can be rebuilt.

  Try: “Clone the pricing table.”

  Network · clone_element_complete

• Copies an element via the protocol

  Does a complete element copy using only the debugging protocol.

  Try: “Clone the footer via the protocol.”

  Network · extract_complete_element_cdp

• Starts a light copy of an element

  Makes a small first copy of an element that you can expand piece by piece.

  Try: “Start a light clone of the navbar.”

  Network · clone_element_progressive

• Adds styles to a light copy

  Loads the styles of a stored light copy on demand.

  Try: “Expand the styles of that clone.”

  Read · expand_styles

• Adds events to a light copy

  Loads the event listeners of a stored light copy.

  Try: “Expand the events.”

  Read · expand_events

• Adds child elements to a light copy

  Loads the child nodes of a stored light copy.

  Try: “Expand the children.”

  Read · expand_children

• Adds CSS rules to a light copy

  Loads the CSS rules of a stored light copy.

  Try: “Expand the CSS rules.”

  Read · expand_css_rules

• Adds pseudo-elements to a light copy

  Loads before/after elements of a stored light copy.

  Try: “Expand the pseudo-elements.”

  Read · expand_pseudo_elements

• Adds animations to a light copy

  Loads the animation data of a stored light copy.

  Try: “Expand the animations.”

  Read · expand_animations

• Lists stored light copies

  Shows the progressive copies held in memory.

  Try: “What clones are stored?”

  Read · list_stored_elements

• Removes one stored copy

  Deletes one stored progressive copy.

  Try: “Remove that clone.”

  Delete · clear_stored_element

• Removes all stored copies

  Deletes every stored progressive copy.

  Try: “Remove all stored clones.”

  Delete · clear_all_elements

• Saves a full element copy to a file

  Writes a complete element copy to a file on your computer.

  Try: “Save a clone of the header to a file.”

  Write · clone_element_to_file

• Saves a full extraction to a file

  Writes a complete element extraction to a file.

  Try: “Save the full extraction to a file.”

  Write · extract_complete_element_to_file

• Saves styles to a file

  Writes an element's styles to a file.

  Try: “Save the styles to a file.”

  Write · extract_element_styles_to_file

• Saves structure to a file

  Writes an element's structure to a file.

  Try: “Save the structure to a file.”

  Write · extract_element_structure_to_file

• Saves events to a file

  Writes an element's event listeners to a file.

  Try: “Save the events to a file.”

  Write · extract_element_events_to_file

• Saves animations to a file

  Writes an element's animations to a file.

  Try: “Save the animations to a file.”

  Write · extract_element_animations_to_file

• Saves assets to a file

  Writes an element's asset list to a file.

  Try: “Save the assets to a file.”

  Write · extract_element_assets_to_file

• Lists saved clone files

  Shows the clone files saved on your computer.

  Try: “What clone files do I have?”

  Files · list_clone_files

• Deletes old clone files

  Removes older saved clone files from your computer.

  Try: “Delete old clone files.”

  Delete · cleanup_clone_files

• Lists browser protocol commands

  Shows the Chrome DevTools Protocol commands that can be run.

  Try: “What protocol commands are available?”

  Read · list_cdp_commands

• Runs any browser protocol command

  Sends a raw Chrome DevTools Protocol command to the browser, which can do almost anything the browser can.

  Try: “Run a protocol command to clear the cache.”

  Runs code · execute_cdp_command

• Runs a script before each page loads

  Installs a script that runs before the page's own JavaScript on every new document.

  Try: “Run this script before every page loads.”

  Runs code · add_script_to_evaluate_on_new_document

• Lists JavaScript contexts

  Shows the JavaScript execution contexts of the page.

  Try: “List the page's contexts.”

  Network · get_execution_contexts

• Finds global JavaScript functions

  Lists functions the page defines globally.

  Try: “What global functions does this page define?”

  Network · discover_global_functions

• Finds methods on an object

  Lists the methods of a JavaScript object on the page.

  Try: “What methods does window.app have?”

  Network · discover_object_methods

• Calls a function on the page

  Runs a page function that was found earlier.

  Try: “Call the checkout function.”

  Runs code · call_javascript_function

• Shows a function's details

  Returns the signature and details of a page function.

  Try: “Show how that function is defined.”

  Network · inspect_function_signature

• Injects and runs JavaScript

  Adds your JavaScript to the page and runs it.

  Try: “Inject this script into the page.”

  Runs code · inject_and_execute_script

• Creates a function that survives reloads

  Defines a page function that stays after the page reloads.

  Try: “Create a helper function that persists.”

  Runs code · create_persistent_function

• Lets the page call the agent

  Exposes a window function so page JavaScript can call back to the assistant.

  Try: “Create a binding the page can call.”

  Runs code · create_page_binding

• Reads calls from the page

  Returns queued calls the page made to a binding, optionally waiting for one.

  Try: “Did the page call my binding?”

  Network · get_page_binding_calls

• Answers a call from the page

  Replies to a page binding call with a value or an error.

  Try: “Answer the page's call with true.”

  Runs code · resolve_page_binding_call

• Removes a page binding

  Deletes a binding and rejects its waiting calls.

  Try: “Remove the binding.”

  Write · remove_page_binding

• Runs several page functions in order

  Executes an ordered list of function calls on the page.

  Try: “Run these three functions in order.”

  Runs code · execute_function_sequence

• Runs Python in the page

  Translates Python to JavaScript with py2js and runs it in the page.

  Try: “Run this Python snippet in the page.”

  Runs code · execute_python_in_browser

• Shows the function executor state

  Reports the state of the function executor.

  Try: “What is the executor doing?”

  Read · get_function_executor_info

• Creates a network hook in Python

  Writes a restricted Python hook that can block, redirect, change or fake requests and responses as they pass.

  Try: “Create a hook that blocks image requests.”

  Runs code · create_dynamic_hook

• Creates a hook from a preset

  Makes a hook from a common ready-made pattern.

  Try: “Create a hook that blocks ads.”

  Runs code · create_simple_dynamic_hook

• Lists active hooks

  Shows the hooks that are running.

  Try: “What hooks are active?”

  Read · list_dynamic_hooks

• Shows a hook's code

  Returns the source and details of one hook.

  Try: “Show me the code of the ad blocker hook.”

  Read · get_dynamic_hook_details

• Removes a hook

  Stops and deletes a hook.

  Try: “Remove the ad blocker hook.”

  Write · remove_dynamic_hook

• Reads the hook docs

  Returns documentation for the request object and hook actions.

  Try: “How do I write a hook?”

  Read · get_hook_documentation

• Shows hook examples

  Returns example hooks.

  Try: “Show hook examples.”

  Read · get_hook_examples

• Reads hook matching rules

  Returns documentation on matching and best practices for hooks.

  Try: “How does hook matching work?”

  Read · get_hook_requirements_documentation

• Shows common hook patterns

  Returns common patterns for hooks.

  Try: “Show common hook patterns.”

  Read · get_hook_common_patterns

• Checks hook code before use

  Validates hook code without running it on traffic.

  Try: “Check that this hook code is valid.”

  Read · validate_hook_function

Watch out for

• It can run code and change traffic in a live browser

  Tools run JavaScript, send raw browser protocol commands and install Python hooks that rewrite requests. Use the --minimal mode or switch off those sections. github.com

• It can read cookies and saved sessions

  Cookie and storage tools return whatever the browser holds, such as login sessions. Do not sign in to sensitive accounts in the browser it controls. github.com

• Can upload files from allowed folders

  The upload tool reads files from folders listed in BROWSER_FILE_UPLOAD_ALLOWED_DIRS, which default to the repo or data folder. Keep that list narrow. github.com

• HTTP mode needs a token

  HTTP mode binds to 127.0.0.1 by default. The README says to set a token before exposing it beyond localhost. github.com

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