Supporting calls are not needed to build the accommodation. They are used to retrieve additional information from booking.com's system.
- OTA_HotelSearch - retrieve status about your accomodations such as "Open&Bookable" or "Autoclosed availability".
- OTA_HotelDescriptiveInfo - retrieve property information
- codegroups - retrieve an extensive list of all codes used in APIs by their code groups (OTA and Booking.com)
- roomname - retrieve an extensive list of standardized room names on booking.com in all languages.
- legalentities - retrieve corresponding legal entity information
- citytaxcategory - retrieve the possible French City Tax categories
For further information that is available these can be found in the Services on the left hand side menu.