Hi Colm,
Thanks for reaching out! I’m afraid that our import tool for The Events Calendar, Event Aggregator, doesn’t support generic event import via REST API at this time. That said, we’re actively working to expand the import options available as part of this tool, and we’ve recently added support for bringing in events from other The Events Calendar or Events Calendar PRO sites. You can read more about this feature addition here:
https://theeventscalendar.com/release-the-events-calendar-4-5/
For a complete list of import types that are currently supported by Event Aggregator, you can check out our product page for Event Aggregator at the following link:
https://theeventscalendar.com/product/event-aggregator/
I hope that helps to get you started! Thanks again, and let us know if you should have any other questions!