Can the hotel booking API let me see which rooms are available before my customer completes their booking?

Yes, the hotel booking API shows you the available room types and their current rates at the hotel and dates your customer is searching for, so they can see exactly what they are booking before they pay.

When your customer searches for a hotel, the API returns the room options that the hotel has told us are free on those dates. Your customer can see the room type, the bed configuration, the size, any special features and the price per night. If they want to book, they go ahead and complete the reservation. This gives them confidence that they are choosing the right room for their needs and not booking something they cannot use.

The rates and availability you see during the search are live information from the hotel supplier, so they reflect what is actually free right now. However, availability and prices can change quickly if other travellers are booking the same hotel on the same dates at the same time. The API will tell you if a room is no longer available or if the price has changed before your customer confirms their payment, so you and they will never be caught out by a surprise.

Your customer should click through the search results to see the full details of each room type before they decide which one to book.