Aria provides a comprehensive suite of APIs, grouped into logical categories, based on their method. All Aria APIs can be found on Developer Central.
The "Core API" category contains APIs that are generally used to work with accounts, account transactions, configuration, and billing interactions.
Object Query API
The "Object Query API" category contains APIs that are used to query and get multi-row feedback across accounts, or to extract client product catalog or marketing information.
The "Admintools API" category contains APIs that deal with managing a client's product catalog and marketing activities including the ability to create, modify, and delete objects.