I have created a calendar system that loads all events from a calendar using Google Calendar API in Javascript, and figures out if the event or free or busy by loading that JSON object.
I want to be able to programmatically, through Javascript preferably, through a link allow someone to click a link to accept the event (I have the event id, calendarId, etc) via email or on a landing page, and the Free/Busy Status will be toggled to Busy.