The Developer's Corner is an area of your admin console that will mostly be used by programmers and other technical staff to integrate Web sites and applications with MailUp.
It's divided into three areas:
The Codes table contains the IDs of Lists, Groups, and Recipient Fields which you will need when retrieving or updating information in MailUp via forms and/or the API.
Here you can retrieve your MailUp API credentials, enable the API, turn on/off IP authentication, and enable/disable specific Web services.
The troubleshooting page gives access to mailing log for email, SMS, and fax mailings.