CapsuleCRM API usage to create individual PDF-Files

We are using CapsuleCRM (see API guide here: [login to view URL]) We want to create PDF-Files using client data from within Capsule. The created PDFs should be downloadable. We need for the first step 2 different PDFs, so it is necessary to create this two PDF templates. We can deliver a ready PDF if it helps and then this PDF is filled with data coming from Capsule. The code for creating the PDFs should be useable/accessable in our internal password-protected drupal-server for Logged-in Users of our company. There is no big need for a perfect interface. From within an internal drupal page (php) it should be possible to access the Capsule Clients database to select a client and then create the PDF. After Creation this PDF should be downloadable locally to any PC on which this is done.