API is for Application programming interface. With set of tools which it provides, you can manage software apps in any way. Use it to integrate whichever application you choose in various manners or you can delegate us to do so.
Select option you are interested in:
Use this format for integration within your service account or software applications f.e. SAP or Dynamics CRM.
This system provides you opportunity to create solutions for a logged user f.e. in mobile applications.