To ensure that our products perform at consistently high service levels, we set both a rate limit and a timeout value.
The API tends to respond in 3-5 seconds to each request you send. However, since we are sending a live ping to check the phone number sent for validation, it can sometimes take longer for the response to be returned. The maximum time we allow is 15 seconds for each call that is submitted to the API. If we cannot determine the correct response in this time, you will receive an HTTP status code of 500 (note that you are not charged for these responses).