Kaleyra’s SMS API will enable you to send SMSes to a mobile number or to a group of mobile numbers, schedules SMSes, edit and delete scheduled SMSes, etc. You can also send Unicode SMSes through this API. An SMS can be sent using XML, and JSON payload over Query string. 

Prerequisites: API Key, Sender ID, ‘To’ phone number and Message content. These prerequisites varies based on the type of use.