Chrome DevTools MCP, Google's server for debugging pages with AI

• Goes to a web address, or moves back, forward or reloads the current page

  Goes to a web address, or moves back, forward or reloads the current page.

  Try: “Open localhost:3000 and reload it”

  Network · navigate_page

• Opens a new browser tab and loads an address in it

  Opens a new browser tab and loads an address in it.

  Try: “Open a new tab with my staging site”

  Network · new_page

• Closes a browser tab

  Closes a browser tab.

  Try: “Close the tab you opened for the docs”

  Write · close_page

• Captures an image of the page or of one element

  Captures an image of the page or of one element.

  Try: “Take a screenshot of the pricing table”

  Files · take_screenshot

• Shows the messages and errors the page wrote to its console since it loaded

  Shows the messages and errors the page wrote to its console since it loaded.

  Try: “Are there any console errors on this page?”

  Read · list_console_messages

• Opens one console message in full

  Opens one console message in full.

  Try: “Show me the full text of that console error”

  Read · get_console_message

• Lists the requests the page has made since it last loaded

  Lists the requests the page has made since it last loaded.

  Try: “Which requests on this page are failing?”

  Read · list_network_requests

• Shows the details of one network request, including its headers and body

  Shows the details of one network request, including its headers and body.

  Try: “Show the response of the login request”

  Read · get_network_request

• Runs a piece of JavaScript inside the page and returns the result

  Runs a piece of JavaScript inside the page and returns the result.

  Try: “Count the images on this page without alt text”

  Runs code · evaluate_script

• Shows the style rules that apply to one element

  Shows the style rules that apply to one element.

  Try: “Why is this button grey? Show its styles”

  Read · get_css_styles

• Runs an audit of the page for accessibility, SEO and best practices and lists what failed

  Runs an audit of the page for accessibility, SEO and best practices and lists what failed.

  Try: “Run an accessibility audit on this page”

  Network · lighthouse_audit

• Starts recording how the page loads and runs, to find speed problems

  Starts recording how the page loads and runs, to find speed problems.

  Try: “Record a performance trace while the homepage loads”

  Runs code · performance_start_trace

• Stops the recording and returns what it found

  Stops the recording and returns what it found.

  Try: “Stop the trace and tell me what is slow”

  Runs code · performance_stop_trace

• Gives more detail on one finding from a performance recording

  Gives more detail on one finding from a performance recording.

  Try: “Explain the largest contentful paint finding”

  Read · performance_analyze_insight

• Clicks an element on the page

  Clicks an element on the page.

  Try: “Click the Sign in button”

  Write · click

• Types into a field or picks an option from a drop-down

  Types into a field or picks an option from a drop-down.

  Try: “Enter my email in the login field”

  Write · fill

• Fills several form fields in one go

  Fills several form fields in one go.

  Try: “Fill out the signup form with test data”

  Write · fill_form

• Types text with the keyboard into the field that is already selected

  Types text with the keyboard into the field that is already selected.

  Try: “Type hello into the search box”

  Write · type_text

• Presses a key or key combination

  Presses a key or key combination.

  Try: “Press Enter to submit the search”

  Write · press_key

• Moves the pointer over an element

  Moves the pointer over an element.

  Try: “Hover over the menu to open it”

  Write · hover

• Drags one element onto another

  Drags one element onto another.

  Try: “Drag the first card into the Done column”

  Write · drag

• Attaches a file through a file picker on the page

  Attaches a file through a file picker on the page.

  Try: “Upload report.pdf to the form”

  Write · upload_file

• Accepts or dismisses a pop-up dialog the browser opened

  Accepts or dismisses a pop-up dialog the browser opened.

  Try: “Accept the confirm dialog”

  Write · handle_dialog

• Waits until given text shows up on the page

  Waits until given text shows up on the page.

  Try: “Wait until Order complete appears”

  Read · wait_for

• Makes the page behave like another device or condition, such as a phone or slow network

  Makes the page behave like another device or condition, such as a phone or slow network.

  Try: “Show this page as it looks on a phone with a slow connection”

  Write · emulate

• Changes the size of the browser window

  Changes the size of the browser window.

  Try: “Resize the window to 375 by 812”

  Write · resize_page

• Starts recording a video of the page

  Starts recording a video of the page.

  Try: “Start recording a video of the checkout flow”

  Files · screencast_start

• Stops the video recording

  Stops the video recording.

  Try: “Stop the recording”

  Files · screencast_stop

• Saves a picture of the page's memory use to a file

  Saves a picture of the page's memory use to a file.

  Try: “Take a memory snapshot of this page”

  Files · take_heapsnapshot

• Summarizes a saved memory snapshot

  Summarizes a saved memory snapshot.

  Try: “Summarize the memory snapshot”

  Read · get_heapsnapshot_summary

• Returns everything available from a saved memory snapshot, including statistics

  Returns everything available from a saved memory snapshot, including statistics.

  Try: “Give me the full details of the memory snapshot”

  Read · get_heapsnapshot_details

• Compares two saved memory snapshots to see what grew

  Compares two saved memory snapshots to see what grew.

  Try: “Compare the before and after memory snapshots”

  Read · compare_heapsnapshots

• Finds objects in a memory snapshot that match filters

  Finds objects in a memory snapshot that match filters.

  Try: “Find large objects in the memory snapshot”

  Read · query_heapsnapshot_objects

• Lists the instances of one kind of object in a memory snapshot

  Lists the instances of one kind of object in a memory snapshot.

  Try: “List the instances of the Cart class”

  Read · get_heapsnapshot_class_nodes

• Shows details about one object in a memory snapshot

  Shows details about one object in a memory snapshot.

  Try: “Show details of that object”

  Read · get_heapsnapshot_object_details

• Shows what is keeping one object in memory

  Shows what is keeping one object in memory.

  Try: “What holds this object in memory?”

  Read · get_heapsnapshot_retainers

• Shows the chains of references that keep one object in memory

  Shows the chains of references that keep one object in memory.

  Try: “Show the paths that keep this object alive”

  Read · get_heapsnapshot_retaining_paths

• Shows the chain of objects that control one object's memory

  Shows the chain of objects that control one object's memory.

  Try: “Show the dominator chain for this object”

  Read · get_heapsnapshot_dominators

• Shows what one object points to

  Shows what one object points to.

  Try: “What does this object reference?”

  Read · get_heapsnapshot_edges

• Finds identical text strings stored many times in a memory snapshot

  Finds identical text strings stored many times in a memory snapshot.

  Try: “Find duplicated strings in the snapshot”

  Read · get_heapsnapshot_duplicate_strings

• Finds closures holding on to memory they no longer need

  Finds closures holding on to memory they no longer need.

  Try: “Find closures wasting memory in this snapshot”

  Read · analyze_heapsnapshot_contexts

• Unloads a memory snapshot to free memory

  Unloads a memory snapshot to free memory.

  Try: “Close the loaded memory snapshot”

  Write · close_heapsnapshot

• Lists the Chrome extensions installed in the browser

  Lists the Chrome extensions installed in the browser.

  Try: “Which extensions are installed?”

  Read · list_extensions

• Installs a Chrome extension from a folder on disk

  Installs a Chrome extension from a folder on disk.

  Try: “Install the extension from ./my-extension”

  Write · install_extension

• Reloads an unpacked extension so changes take effect

  Reloads an unpacked extension so changes take effect.

  Try: “Reload my extension”

  Write · reload_extension

• Runs an extension's main button action

  Runs an extension's main button action.

  Try: “Click my extension's toolbar button”

  Write · trigger_extension_action

• Removes a Chrome extension

  Removes a Chrome extension.

  Try: “Uninstall my test extension”

  Delete · uninstall_extension

• Lists the tools a web page offers to AI assistants itself

  Lists the tools a web page offers to AI assistants itself.

  Try: “What tools does this page expose?”

  Read · list_webmcp_tools

• Runs one of the tools a web page offers to AI assistants

  Runs one of the tools a web page offers to AI assistants.

  Try: “Run the page's add-to-cart tool”

  Runs code · execute_webmcp_tool

• Lists extra developer tools a page exposes for runtime information

  Lists extra developer tools a page exposes for runtime information.

  Try: “List the developer tools this page exposes”

  Read · list_3p_developer_tools

• Runs one of the extra developer tools a page exposes

  Runs one of the extra developer tools a page exposes.

  Try: “Run the page's state inspector”

  Runs code · execute_3p_developer_tool

• Installs a web app so it opens in its own window

  Installs a web app so it opens in its own window.

  Try: “Install this web app”

  Write · install_pwa

• Opens an installed web app

  Opens an installed web app.

  Try: “Launch the installed app”

  Write · launch_pwa

• Removes an installed web app and closes its windows

  Removes an installed web app and closes its windows.

  Try: “Uninstall the web app”

  Delete · uninstall_pwa

• Shows how an installed web app is set up in the operating system, such as badge count

  Shows how an installed web app is set up in the operating system, such as badge count.

  Try: “Show the installed app's badge count”

  Read · get_os_app_state

• Adds a virtual security key to the page for testing passkey sign-in

  Adds a virtual security key to the page for testing passkey sign-in.

  Try: “Add a virtual authenticator to test passkey login”

  Write · configure_webauthn

• Clicks at exact screen coordinates (needs a special setting turned on)

  Clicks at exact screen coordinates (needs a special setting turned on).

  Try: “Click at 200, 340 on the page”

  Write · click_at

• Used by the assistant behind the scenes

  Lists the tabs open in the browser

  Lists the tabs open in the browser.

  Try: “Which tabs do you have open?”

  Read · list_pages

• Chooses which open tab the next actions apply to

  Chooses which open tab the next actions apply to.

  Try: “Switch to the tab with the checkout page”

  Read · select_page

• Reads the page as a text outline of its elements, so the assistant can find things

  Reads the page as a text outline of its elements, so the assistant can find things.

  Try: “Show me what is on this page”

  Read · take_snapshot

Watch out for

• Agent can read and change anything in the browser

  Everything in the controlled Chrome is open to the AI client, including pages you are signed into. Use the default separate profile or --isolated rather than --autoConnect to your main browser for untrusted work. github.com

• Web pages can try to steer the agent

  Page text and script output reach the model, so a hostile page can attempt prompt injection. Restrict sites with URL patterns for unattended runs. news.ycombinator.com

• Usage statistics are on by default

  Google collects tool success rates, latency and environment info unless you pass --no-usage-statistics. Trace URLs may also go to the CrUX API unless you pass --no-performance-crux. github.com

• Open debugging port is reachable by other apps

  With --browser-url, any program on your machine can control Chrome through port 9222. Use a separate --user-data-dir and avoid sensitive sites while it is open. github.com

• URL allowlist missed service worker fetches (fixed)

  Before the fix, a service worker on an allowed page could still reach blocked sites. Treat URL patterns as a guard rail, not a hard boundary, and stay on a current version. github.com

Security advisories

In their words