An application programming interface (API) is a source code interface that a computer system or program library provides in order to support requests for solution to be made of it by a computer program.
The software that provides the functionality described by an API is said to be an implementation of the API.
The API itself is abstract, in that it specifies an interface and does not get involved with implementation details.

•      A coherent interface consisting of several classes or several sets of related functions or procedures.

•     A single entry point such as a method, function or procedure.

We have used API to build many custom applications for variety of CAD packages like AutoCAD, CADRA, Solidworks.

The following applications were developed using the API

1. GIS - Electrical Distribution Network

2. GIS -Water supply and sewer network

3. DWG viewer Component (interactive) for one of our product

4. Parametric 3D modeling (in Solidworks - Generates a 3D model based on the inputs)