POSTrequest that we send to your machine, informing you that the data extraction task is completed and the result is ready to be downloaded. A callback URL, in turn, is the URL we will send the POST request to.
callback_urlparameter to specify the URL where we should
POSTour notification to.
sourceparameter is one of the most important parameters. It sets the scraper that we will use to process your request.
sourceparameter value on the documentation page of the domain of your choice.
user_agent_typeparameter lets you specify what kind of a User-Agent header value we should use to fulfil your request.