Kik Interactive announced availability of an API which will enable developers to add instant content sharing to apps, with the company also updating its own Kik Messenger app to enable customers to discover and download products which support the feature.

The API sees Kik Messenger handing the transmission of content from one user to another, with the company stating that this provides “the advantage of Kik’s fast and reliable communication platform, and its millions of app-savvy, cross-platform users around the world.” It said that the API, along with the Apps That Kik discovery service, offers “an insanely simple solution to drive app adoption for developers.”

A number of apps using the API are already available, including casual social game Zwonks, iPhone greeting cards and emoticons app Smiler, and file sharing app FileKicker.

According to Kik, developers can integrate with its service by adding “only five lines of code” to their apps.

Launched in October 2010, Kik Messenger was said to have seen “amazing viral growth, hitting over two million users in just three weeks.” The company does not provide current figures for its userbase.