Clicks on the provided element

Closes the page by its index. The last open page cannot be closed.

Drag an element onto another element

Emulates various features on the target page.

Evaluate a JavaScript function inside the target page. Returns the response as JSON, so returned values have to be JSON-serializable.

Type text into an input, text area or select an option from a element.

Fill out multiple form elements (inputs, selects, checkboxes, radios) at once. ALWAYS prefer this tool over multiple individual 'fill' or 'click' calls when interacting with forms. It is significantly faster, more reliable, and reduces turn count. Example: Fill username, password, and check "Remember Me" in one call.

Gets a console message by its ID. You can get all messages by calling list_console_messages.

Gets a network request by an optional reqid, if omitted returns the currently selected request in the DevTools Network panel. Useful for inspecting request headers (including 'Cookie') and response headers (including 'Set-Cookie' and directives).

If a browser dialog was opened, use this command to handle it

Hover over the provided element

Get Lighthouse score and reports for accessibility, SEO, best practices, and agentic browsing. This excludes performance. For performance audits, run performance_start_trace

List all console messages for the target page since the last navigation.

Lists the most recent requests for the target page since the last navigation.

Get a list of pages open in the browser.

Go to a URL, or back, forward, or reload. Use project URL if not specified otherwise.

Open a new tab and load a URL. Use project URL if not specified otherwise.

Provides more detailed information on a specific Performance Insight of an insight set that was highlighted in the results of a trace recording.

Start a performance trace on the target webpage. Use to find frontend performance issues, Core Web Vitals (LCP, INP, CLS), and improve page load speed.

Stop the active performance trace recording on the target webpage.

Press a key or key combination. Use this when other input methods like fill() cannot be used (e.g., keyboard shortcuts, navigation keys, or special key combinations).

Resizes the page's window so that the page has specified dimension

Select a page as a context for future tool calls.

Capture a heap snapshot of the target page. Use to analyze the memory distribution of JavaScript objects and debug memory leaks.

Take a screenshot of the page or element.

Take a text snapshot of the target page based on the a11y tree. The snapshot lists page elements along with a unique identifier (uid). Always use the latest snapshot. Prefer taking a snapshot over taking a screenshot. The snapshot indicates the element selected in the DevTools Elements panel (if any).

Type text using keyboard into a previously focused input

Upload a file through a provided element.

Wait for the specified text to appear on the selected page.

Get the browser to the exact place where you want to look, in one call. Give a goal such as 'dismiss the cookie banner, log in, and open the Billing tab'. Jev (TypeSafe's decision model) picks one element and one action per step in about 300 ms, with no page text entering your context. Then call list_console_messages, list_network_requests, take_snapshot, or take_screenshot on the same tab; the walk is recorded for them. Jev never types free text: pass anything to type in 'values' (for example {email, password}), and only the names are shown to Jev. Stops before orders, payments, sends, deletes, and publishes unless allow_irreversible is set. Acts on the currently selected page and returns its page_id; pass that as pageId to the follow-up call.