title: Viber messenger API
body: <p>I'm looking for a library to do requests to Viber messenger server.
  I need to:</p>
  
  <ul>
  <li>send messages to users;</li>
  <li>check sent messages delivery status;</li>
  <li>check that a user has Viber account.</li>
  </ul>
  
  <p>I know that Viber has no open API for developers, but maybe someone has experience with reverse engeneering of Viber protocol or some else methods of communication with Viber.
  Or if someone can do it, please, write me, I have a suggestion for you.</p>