Most of the interaction between applications, branches from the use of application programming interfaces, also known as API’s. These interfaces became the heart of many created applications, not only to meet the needs of a single application, but also providing the possibility of third-party Apps to communicate data. The development of these interfaces obeys to certain rules, with some differences from other common applications. Only developers with a lot of experience in API development have the knowledge needed to create one correctly. That's what led SHOUTABOUTUS (https://www.shoutaboutus.com) to the creation of an API that allowed them to receive and send business data to their customers through their applications.