I am in the process of setting up the WP Rentals theme on a Wordpress website and require the booking calendar that is displayed on each individual rental property page of the theme to be integrated with the ResBook booking system.
An example of what we are looking for can be found by looking at the booking calendar at this website, which is also integrated with the Resbook Booking System.
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We will need booked days to be displayed in the calendar as unavailable. Users can fill out the form details, when clicking Book Now the its links to the ResBook booking page in the example above. However we can use booking form similar to like the WPRentals theme already has.
API Documentation for Resbook Booking System attached. Let me know if you need any further information.