Attach to an already-running Chromium browser via CDP (does not launch a browser). Accepts HTTP (http://127.0.0.1:9222) or WebSocket URLs. Pass capture_dir to start saving every matching request as JSON into that folder (no count limit). Returns session_id for later tools.

Navigate the session's current page to a URL.

Reload the current page.

Go back in history.

Capture the current page as a PNG screenshot (returned as image content).

Click an element by CSS selector, or click at page coordinates (x, y). Supports right/middle click, double-click, and modifier keys.

Hover the mouse over an element matched by CSS selector.

Move the mouse to page coordinates without clicking.

Input text. With selector: fill the element (or type key-by-key). Without selector: type into the focused element. Modes: fill (replace value), type (real key events), insert (paste-like, no key events).

Press a key or shortcut, e.g. "Enter", "Tab", "Escape", "Control+A", "Meta+V". Optional selector focuses that element first.

Choose option(s) on a element by value, label, or index.

Check or uncheck a checkbox / radio.

Set files on an . Paths must exist on the machine running this MCP server.

Scroll an element into view, wheel by delta, or jump to page coordinates.

Run a JavaScript expression in the page and return the JSON-serializable result.

Get page HTML, or innerHTML of a selector. Large documents are truncated.

Return the current page URL, title, and frame URLs.

Wait until a CSS selector appears, or wait a fixed timeout in milliseconds if no selector is given.

Start network capture for this session. Every matching request is written as a JSON file into dir (plus requests.jsonl). No count limit. Call before navigating if you need the first document request.

Stop capturing. Files already written to dir are kept.

List requests already saved on disk. Default last 50 summaries. Use include_body / include_headers to read the JSON files. Capture must have a dir (from cdp_connect capture_dir or cdp_network_start).

Wait until a response whose URL contains url_contains (optional method/status). Returns status, headers, and a truncated body.

Read cookies from the browser context. Optional url limits the set.

Write cookies onto the browser context of this session.

List all active CDP sessions in this MCP process.

Disconnect this session from the browser and drop it from the session list.