A good start would be to browse through the ‘how to consume a rest/web service” docs on the Mendix site.
You can do this with for example a ‘call restservice’ activity, see:
https://docs.mendix.com/refguide/call-rest-action
or see this one with example video: https://docs.mendix.com/refguide7/consumed-rest-services#3-examples
See also the learning module Importing Data Consuming REST Services : https://gettingstarted.mendixcloud.com/link/module/138/lecture/1226