...
The SMX For Applications Reservation API is based on the Open Travel Alliance (OTA) specifications for 2017A. Although this document attempts to be technically comprehensive it is expected that the connecting system’s developers be somewhat familiar with the OTA specifications found here.
...
Process Flow
When a reservation is created, modified or cancelled in the partner PMS application (Reservation Uploader/Data Publisher) and is pushed to SiteMinder’s SMX platform, SiteMinder will generate a notification for each reservation event and PUSH reservation notifications to subscribing SMX partner applications. Partner applications will need to provide a webservice endpoint to receive the reservation notifications. The subscribing SMX partner applications can then use these reservations to offer value added solutions for the hospitality and travel industry.
...