If you wish to use RESTful Services with Oracle Application Express Listener 4.1.1 you must apply a patchset to Oracle ApplicationThis patch actually creates the APEX_LISTENER and APEX_REST_PUBLIC_USER database users.
Express. The patchset is not required for Oracle Application Express 4.2. Follow the instructions below:
Switch to the folder where you unzipped Oracle Application Express Listener
Open the folder named: apex_patch
Follow the instructions in the file named README.txt
It is not the case if you install ApEx 4.2 - these two users are NOT created in the database by the 4.2 install process.That's only true if you didn't perform the APEX 4.2 installation as documented. Take a look at the [url http://docs.oracle.com/cd/E37097_01/doc/install.42/e35123/otn_install.htm#BABFGHFJ]corresponding part of the APEX 4.2 installation guide.