If you're new to the Dotdigital API, check out the article Getting started with the API.
Marketing and automation
Calls for automation programs, campaign setup, campaign assets and pages/forms
Contacts and data
Calls to import and export contacts, transactional / insight data, preferences, subscriptions and more...
Communications
Calls to provide real-time communications with transactional email and omnichannel messaging
Accounts and utilities
Calls to get your account information and help maintain your account