REST API for Events, does not return comments

You need to do another API call to get the comments. 

community.telligent.com/.../list-comment-rest-endpoint

Great. I pass the applicationId or contentId? its not specific to event right? please correct me if I'm wrong

If you pass the ContentId that will give the specific event's comments only.

Gaurav Kanade said:

This is the response i get for the rest API /api.ashx/v2/calendars/events/{calendarId}.json

For this API did you mean to write {calendarId}? If so that is incorrect as this is the {eventId}. The API for events is /api.ashx/v2/calendars/{calendarId/events.json