APIs-Course-2025

What Is API Documentation? API documentation is a technical manual that describes how to use and integrate an API. It includes: Good API documentation: Popular Tools for API Documentation 1. Swagger (OpenAPI Specification) Swagger is one of the most popular tools for creating, visualizing, and sharing API documentation. It uses the OpenAPI Specification (OAS) to … Read more

What Are APIs in JavaScript? In JavaScript, APIs are mechanisms that allow code to communicate with other software, services, or hardware. APIs are commonly used to: JavaScript APIs can be categorized as: Common JavaScript APIs 1. Fetch API The Fetch API allows you to make HTTP requests to fetch resources like data from a server. … Read more

What Is a REST API? A REST API (Representational State Transfer Application Programming Interface) uses HTTP methods like GET, POST, PUT, and DELETE to interact with resources. These resources are represented as URLs, and the API delivers data in formats like JSON or XML. Step 1: Setting Up Your Development Environment Before building an API, … Read more

APIs often rely on data formats to exchange information between clients and servers. JSON (JavaScript Object Notation) and XML (eXtensible Markup Language) are the most widely used data formats for this purpose. Both formats have unique characteristics, advantages, and use cases, making them suitable for different scenarios. What Is JSON? JSON (JavaScript Object Notation) is … Read more

Error handling is a critical aspect of API development. It ensures that your API communicates effectively with clients when something goes wrong. Proper error handling not only improves the user experience but also helps developers debug issues quickly. What Is Error Handling in APIs? Error handling in APIs refers to how an API responds to … Read more

What Are Query Parameters? Query parameters are key-value pairs appended to the end of an API URL to modify or filter the response. They are introduced by a ? in the URL and separated by an & when there are multiple parameters. Query parameters are flexible and provide a way to pass information without altering … Read more

What is Pagination in APIs? Pagination is the process of dividing large sets of data into smaller, discrete chunks (called “pages”) to make it easier to manage and retrieve. When a client makes a request to an API for a large dataset, instead of retrieving all the data at once, the server breaks the data … Read more

API rate limiting is a technique used by web services to control the number of requests a user can make to an API in a given period of time. This is crucial for ensuring that APIs remain available, prevent abuse, and ensure fair usage across users. Without rate limiting, APIs could become overwhelmed with requests, … Read more

What is API Authentication? API authentication is the process of verifying the identity of the client making the request. It ensures that the client is who they claim to be and helps protect sensitive data. The most common ways to authenticate users in API requests are by using API keys, Basic Authentication or more sophisticated … Read more

Testing APIs is a crucial part of the development process. Whether you’re creating a new API or working with third-party services, it’s important to test your API endpoints thoroughly. This ensures that they function as expected, provide accurate responses, and handle errors appropriately. Why API Testing is Important API testing helps developers verify that their … Read more