How to add attendees to RSVP list
You can add RSVPs to your RSVP attendee list by going to your RSVP event landing page and entering their name, email, and any other information you are requesting, and they will be RSVP'd and receive the confirmation email and reminder emails. Please note that entering their information from the RSVP landing page on their behalf will not get the event added to their calendar.
Or, you can use AddEvent's API: https://www.addevent.com/documentation/events-api#anchor-rsvp-attendee-create.
Updated about 9 hours ago