There are 2 methods for handling your API requests: Direct (Synchronous) requests  – as soon as you send a request you will receive a response in an average of 5 seconds Asynchronous requests – send a request without waiting for the response With Asynchronous requests, when you send a request, you get a “response ID.” We store the response for 24 hours from the time the request was sent. You can collect the responses at your convenience via a designated endpoint API command or webhook that notifies you when a request is completed and you can collect its result. Therefore, Asynchronous mode in fact requires 2 separate requests: Sending the request – This request includes the search parameters, returns a response_ID, and a cost.  Note: This request syntax is different from that of synchronous requests and requires an API token for authentication Collecting the response – This request includes the response_ID and is free of charge.