A quick google search shows that they support rest services.

https://docs.microfocus.com/integrations/Integrations/Integration_634.html

Here is some documentation on how to do use rest service calls in mendix.

https://docs.mendix.com/howto/integration/consume-a-rest-service

also the link to the learning modules

https://gettingstarted.mendixcloud.com/index3.html