3rd party API integration
is the integration of APIs developed by a 3rd party (Facebook, Twitter) in one's custom software to gain partial access to services, features or functionalities for better business process.
A 3rd party API is an API developed by a 3rd party. By integrating these APIs, 1st parties can gain partial access to the features and functionalities of 3rd party services. Next time when you book an Uber, take a close look at the Maps. These maps are available due to the 3rd party integration of Google Maps API with Uber.