Kaleyra’s APIs are built in a robust way to be able to handle a certain number of requests and automatically throttle the requests to our queues.

Keeping this in mind, please note that, the requests that can be made from the Clevertap integration is up to 50,000 requests, for every 5 minutes.

This is only for single message requests and does not work for bulk requests.

Note: 

Kaleyra recommends that you limit the number of messages being sent to no more than 50,000 messages for every 5 minutes. Read more now on how to set the throttle limit.