To access forms directly in 12.2.4, we need to go to URL

http://hostname.domain:port/forms/frmservlet

If you have out of the box configuration, you will get the error

APP-FND-01542: This Applications Server is not authorized to access this database

To get this working, you need to modify your current run context file, and chnage the “s_appserverid_authentication” value from SECURE to OFF. Then run Autoconfig on RUN FS.