API (Application Programming Interface)

A set of tools and protocols used for building, developing and interlinking software and programmes
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What is the API (Application Programming Interface)?

An Application Programming Interface (API) is a set of rules and protocols that allows different software applications to communicate and interact with each other. It defines how different software components should interact, what data can be exchanged, and what actions can be performed.

What is the function of API?

APIs act as intermediaries, enabling applications to access certain functionalities or data from other software systems, services, or platforms without having to understand the underlying implementation details. They provide a well-defined interface through which applications can send requests and receive responses, facilitating seamless integration and interoperability between different software systems.

What is the purpose of API?

APIs can be used in various contexts, such as web development, mobile app development, operating systems, databases, and more. They can serve different purposes, including:

Data retrieval

APIs can allow applications to fetch data from external sources, such as retrieving weather information from a weather service or fetching user details from a database.

Functionality access

APIs can provide access to specific functionalities or services, such as payment gateways, social media integration, or mapping services.


APIs enable different software systems to communicate and exchange data, facilitating integration between disparate systems. For example, APIs can be used to connect a web application with a backend server or to link different services within a microservices architecture.

Development efficiency

APIs can accelerate software development by providing pre-built functions or components that developers can use instead of reinventing the wheel. This promotes code reuse and simplifies the development process.

APIs are typically documented, specifying the available endpoints, parameters, data formats, authentication methods, and response structures. This documentation helps developers understand how to interact with the API and build applications that utilize its capabilities effectively.

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