List all open Chrome page tabs with their targetIds, titles, and URLs. When you are unsure which tab to inspect, call this proactively to discover available tabs, then present the list to the user and ask which one to switch to — do NOT tell the user to switch tabs manually in Chrome.

Switch the MCP connection to a specific Chrome tab. Use list_tabs first to get available targetIds.

Get the title of the currently connected tab (document.title).

Get the URL of the currently connected tab (location.href).

Get the full HTML source of the currently connected tab (document.documentElement.outerHTML). Truncated to 20 000 characters for large pages.

Evaluate javascript in page. To access the currently selected element in the Elements panel ($0), use get_inspected_element instead.

Get computed CSS values for the given properties on the element matched by selector.

Capture a PNG screenshot of the current viewport (the visible page area only — not the full scrollable page, not the browser chrome, not DevTools).

Get the element marked for MCP inspection. To mark an element: select it in the Elements panel, then run window.$0 = $0 in the DevTools console.

Get current debugger state: whether execution is paused, the pause reason, hit breakpoints, and the full call stack with file/line info.

Inspect variable values in a call frame scope. Only works when execution is paused. Use get_debugger_state first to find available frame indices.

Set a breakpoint by URL (exact or regex) + line number.

Remove a breakpoint by ID. The ID is invalidated; use set_breakpoint to restore (returns a new ID).

List breakpoints tracked by this server (set via set_breakpoint). Breakpoints set outside this server (DevTools UI, other CDP clients, prior sessions) are not visible — CDP has no API to enumerate them.

Pause JavaScript execution immediately. After pausing, use get_debugger_state to inspect the call stack.

Resume JavaScript execution after a breakpoint or pause.

Execute the current line and pause at the next line (does not enter function calls). Returns the new call stack position.

Step into the function call on the current line. Returns the new call stack position.

Evaluate a JavaScript expression in the scope of a paused call frame. Unlike evaluate_js, this has access to local variables, closure variables, and the current this. Only works when execution is paused.

Step out of the current function and pause at the caller. Returns the new call stack position.

Return browser console messages and uncaught exceptions. Includes messages already visible in DevTools before this server connected, plus new output produced afterwards. Exceptions are reported with their full stack trace (source-mapped when available).