The following Scenario gives an introduction how to invoke external services into your modeling language by the two examples:

1. Wiki Interaction
        Models defined using the i* implementation in ADOxx are made available in a MediaWiki environment.
2. Google Maps Interaction
        Models defined for the design of supply chain distribution networks are enhanced with geolocation data using the Google Maps WS and Open Street Map WS.

Link:
    API/Web-Service Invocation