Introduction
APIs or Application Programming Interfaces ease communication between different software programs. From the developer’s perspective, these APIs act as intermediaries facilitating the use of particular service or application’s features and information without necessarily knowing how the service internally operates. This abstraction reduces the complexity of development and allows applications to work together.
There are many types of APIs like REST, SOAP, and GraphQL. RESTful APIs are the most popular among developers because they are easy to use and fast, adhering to the normal HTTP methods of exchange.
Once a developer makes an API call, the API will receive the request, internally process it and return a structured response, often in the form of JSON or XML. Applications can then make use of other applications functions and services for retrieving data from others, integrating several together or performing several operations.
Conclusion
In summary, APIs are indispensable components of modern software systems that facilitate effective development of applications by providing integration capabilities.
Reference
IBM Developer "Understanding APIs: A Beginner’s Guide."





