Hi Tobias,
Yes you can execute REST GET request with query parameters in the URL link (including subscription-key). If you look a the screenshot that you have provided, you will see that it gives you ability to set the URL parameters.
To resolve the issue I would start with troubleshooting the 412 response. In general the 412 response is known as Precondition Failed. This error can be caused by invalid set of headers that send to Azure cloud. If the query works in Postman, that I would set the same set of headers in the Make Request for in UCCX script. HTTP 412 can also be sent by server indicating that the object that you re trying to modify has been changed and you need to pull it back (if tha API has some states). But if you are using GET method, I assume that you want to pull data from cloud.
Another clue that may be useful is the text description of the error: "java.net.NoRouteToHostException: No route to host (Host unreachable)". To verify this error you will need to login to UCCX CLI (as OS Administrator) and issue the command: utils network ping xxxxxxx.azure-api.net. This will check if the server is able to communicate with the cloud - it may be blocked by firewall. It will also tell you if the name can be resolved by UCCX server.
And last tip. If you are using HTTPS protocol you will need to upload the API server certs and add them to UCCX trusted store. Here is a text from Cisco doc (https://www.cisco.com/c/en/us/support/docs/customer-collaboration/unified-contact-center-express/118855-configure-uccx-00.html#anc13):
Third-Party Applications Accessible from Scripts
If a UCCX script is designed in order to access a secure location on a third-party server (for example,
Get URL Document step to an HTTPS URL or a Make Rest Call to an HTTPS REST URL), upload the signed or
self-signed certificate chain of the third-party service to the UCCX tomcat-trust keystore. In order to obtain
this certificate, access the UCCX OS Administration page and choose Upload Certificate.
The UCCX Engine is configured in order to search the platform Tomcat keystore for third-party certificate chains
when presented with these certificates by third-party applications when they access secure locations via script
steps.
The entire certificate chain must be uploaded to the platform Tomcat keystore, accessible via the OS
Administration page, as the Tomcat keystore contains no root certificates by default.
After you complete these actions, restart the Cisco UCCX Engine.
