Foursquare Real-time

Foursquare is a local search and discovery service company that provides customers with information on events, restaurants, tourist attractions, and more..The Real-time API allows developers to integrate Real-time information into their applications. There are two sub APIs with this API, one is User Push API which lets the application knows whenever a user has checked in a place, and the other is Venue Push API which lets the developers know of any actions happening to their managed venues.