I have been an enthusiastic APEX fan for years. And like every APEX fan, I also have a workspace on APEX. https://apex.oracle.com.
Here Oracle offers the possibility to get to know APEX and to host small demo projects. You can switch and manage within your workspace as you like. What Oracle does not offer here, however, is external access to the database / schema with an IDE or SQLPlus. Of course, otherwise Oracle would have to publish the port of the DB listener.
Recently I read an article by Peter Raganitsch. Link: http://www.oracle-and-apex.com/streaming-flat-file-data-into-database/ Here he describes how to upload and evaluate log files via RESTful Service. When I read that, I had an idea. Why shouldn’t this also work with my source code?