Hi Vedant,
The reports you see in Cvent aren't able to be pulled directly via API, however virtually every object such as Events, Contacts, Sessions, Attendees, Travel etc are available with a suite of filters to break down the data in the ways you need it. I would suggest reaching out to your account team to have a discussion on how to best utilize API for you needs.
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Carl Robinson
Senior Solutions Specialist
Cvent
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