Act

An MCP tool from the Browserbase server, run by Browserbase.

Perform an action on the page

Name on the gateway: browserbase__act.

Parameters

Name	Type	Description
`action` required	`string`
`sessionId`	`string`	Optional Browserbase session ID. For `start`, pass an existing session ID to reuse it instead of creating a new session. For other tools, pass the sessionId returned by `start` to target or reattach to that session; if omitted, they use the current active session.

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments

{
  "name": "browserbase__act",
  "arguments": {
    "action": "…"
  }
}

The first call connects Browserbase to your account automatically; nothing to set up. About this server.

Use the act tool with action set to ….