In this how-to article a hello world style introduction to leveraging a REST API with an OpenAPI specification is presented. The complete example can be found here.
That article discusses creating the attached application. This application can be opened using the AIMMS Community edition. After obtaining an API key from ipTwist, and filling in my own IP address it shows me a location in the Netherlands:
Great how-to Chris!
Hey everyone! There is a new version of this application available using abstractAPI, it is free for you to sign up and use an api key. 
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