As of July, 2018, applicant data is delivered by a simpler api which is documented here.

Features include:

  1. Real time data (no caching).
  2. Authentication by oauth.
  3. Only five methods, applicant, applications, files, letters, and interviews.
  4. Application tokens can be used to fetch information and letters.

If you are using the older api, pre July 2018, follow the Legacy Api link on the right menu.