Making connectivity between a channel manager and a booking Saas

I'm using [login to view URL] for the booking process of my website. That includes a calendar of avaibilities for each ressource (a bed in a hotel or B&B or a cottage to rent) and prices with rules for the holiday stays. And I have to make a connectivity with Cubilis, a channel manager. 1st step : - create 3 endpoints There are 3 endpoints because I chose the pull method for reservations : OTA_HotelRoomListRQ OTA_HotelAvailNotifRQ OTA_HotelResRQ - send them to me - I send them to Cubilis - if Cubilis approves, Cubilis opens a test account - Mission accomplished. Then, I send you the second mission.