URX is an API that allows developers to perform deep linking tactics. This tutorial, posted on URX's developer's site, shows how to use URX to let a user listen to a song using an Android device. The walkthrough will show one how to use the URX Search API to find a deeplink to a specific song or artist in an app like Spotify, which you can then display to your user.
The next generation of smart city applications and user interfaces are beginning to emerge based on the European-initiated FIWARE open API platform. The platform provides an open source toolkit of APIs and backend infrastructure components that enable app developers to create new city solutions.