Real Estate MLS data feed integration

We have a real estate site built on flynax classified script. We are trying to connect our real estate MLS to our site using the XML import plugin. The MLS uses a rest API to deliver the data. We are looking to import active listings for each property type. Here is a link to the MLS documentation: https://vendor.utahrealestate.com/webapi/docs
This link is to the XML plugin: https://www.flynax.com/plugins/xml-import-export.html