CDP messages

The Message tab is a raw CDP command sender with full autocomplete over every method in the protocol. Type a domain and method (e.g. Page.navigate), and the Method field suggests matches with their domain and a deprecation badge where relevant; selecting one pre-fills the Params box with a skeleton of its required parameters. A “CDP docs” link jumps to that exact method’s page in the official protocol reference.

Composing a command: method autocomplete and JSON params, ready to send.

Every command sent and every event received is logged below, color-coded by direction (sent vs. received) and outcome (ok vs. error). Rows expand to show the full raw JSON, and the log supports search, a configurable retention limit, and exporting the whole history to a JSON file (Export logs). Screencast frames and raw input events are hidden from the log by default (toggle) to keep it readable.

The response log - sent commands (orange, up arrow) and received events/responses (blue, down arrow).