Once you have downloaded the data initially the partner can begin calling the Properties Changes Since API. This includes changes to hotel content for any reason, not just rooms, so there will likely be several hotels each time the request is made. The specific change to each hotel is not detailed so resellers should do a full update of each property detailed to ensure they are up to date. Mr & Mrs Smith do a full update to 'from prices' on our site at 2am and 2pm UK time every day. To prevent the reseller seeing all properties in the response, we would actually recommend you make this call every 12 hours and set your 'time since' to the 2:45am and 2:45pm mark, as our pricing update is complete by then.Â