OPEn is designed to be easy to use! At a high-level, if you can access the Internet from a browser, you can access OPEn.
Modern Internet browser (for example, Internet Explorer 5.0 from 1999 isn’t going to cut it)
Cookies need to be enabled
Each user needs to have a unique email address
Things not supported today:
Integration with Active Directory / LDAP or other single sign-on methodologies.
Although we have engineered to support it in the future, we do not currently support software integration or have an API available.