From HEXONET Wiki
System API Downloads
A really important feature to track all domain-transactions. Normally you can poll all domain-events by using the commands:
DeleteEvent. Alternatively you can use the option
Receive Events over POP3. Please note that you should always choose only one method to avoid inconstancies.
HEXONET informs you via email about all events via the
PushEvents feature. PushEvents is an additional event messaging service to store and process all product-related events on your side. Inform your client about outgoing/incoming transfers, successful registrations and many more. It can also be used as a backup solution for your own security.
System API error codes
Please find below a list of all API - Error CODES:
Core API commands
Download: Core API manual (Version 2.6)