API connection - is it possible to sync only the availability calendar but not rates?

Re the API connection to Vrbo and Booking.com - is it possible to sync only the availability calendar but not rates?

Direct bookings via our website will have different rates - and we won't be taking payment online - so we only want to display the availability calendar, as rates will be displayed separately on the site. Would rather not use iCal due to the limitations in sync frequency.