The Stream PHP SDK by Stream allows API interaction to access activity streams and news feeds data. Installation with composer is available. Usage demonstrates how to create a new client, set API endpoint, and create a new feed activity.
In 2011, the Guardian launched its local messaging bulletin: n0tice. Although the platform encouraged open journalism, the Guardian has expanded the effort with the launch the n0tice API last week. The very premise of n0tice offers value from a locality perspective. With the open API, the value of the local bulletin can be integrated with any developer's application.
Three months after its initial launch, much-talked-about data portability service Gnip has released version 2.0 of its API, as well as the first glimpse of a business model. As we covered back in March, Gnip's goal is to "connect Data Consumers to Data Publishers in a low-latency, highly-scalable standards-based way." Gnip is a sort of proxy that makes data from diverse Publishers--services like Delicious or Twitter, which create activity content--available in a unified format, and notifies Consumers--like FriendFeed or Plaxo--via a push interface when new data is available. The new version of the API adds full data delivery, XMPP support, and advanced data filtering.
For the past few months, the API of microblog site Twitter has been used as the basis for many popular and creative mashups. Now Facebook, with the launch of its highly anticipated Open Stream API, is attempting to gain some attention as a platform for social networking applications.