Hi, Shane. Thanks for your interest in our plugin suite.
Event Aggregator (EA) is a service (SaaS) already built into The Events Calendar. In other words, there’s no need to install anything new. Simply purchase the license, enter the license key on the Events > Settings > Licenses screen, and that will unlock the importing features under Events > Import.
You can import from one site running The Events Calendar to another site running The Events Calendar.
If you’re not importing from one or more sites that run The Events Calendar, you could import their iCal feeds/URLs.
If you really just want to use the API with your own custom code, our REST API does have CRUD capabilities. Please reference https://theeventscalendar.com/knowledgebase/introduction-events-calendar-rest-api/
Last but not least, we have a pretty great Refund Policy so you can buy one or many of our add-ons and thoroughly test them.
I hope this info helps. Let me know if you have any follow-up questions.