API Development & Integration
In computer programming, an application programming interface (API) is a set of subroutine definitions, protocols, and tools for building software and applications. A good API makes it easier to develop a program by providing all the building blocks, which are then put together by the programmer.
Usually custom API development is used in business to business applications where one program can use the services of another specializing in a particular field. APIs are base on different methodology but most common SOAP and XML and Web Services are used for exchange of data on the internet.