Testing REST APIs with cURL Commands

Every developer, tester, and system administrator needs a reliable way to interact with web services directly from the command line. While graphical tools exist, the command line remains the fastest and most scriptable environment for testing integrations. This course teaches you how to construct, execute, and troubleshoot API requests using cURL, the industry-standard command-line tool. You will start with foundational concepts of the HTTP protocol, learning how headers, methods, and status codes work before writing your first commands. From there, you will progress to handling real-world scenarios like authentication, payload transmission, and request inspection. What you will learn: Understand core HTTP concepts, REST architecture, and how cURL interacts with web servers; Construct and execute GET requests to retrieve data and inspect response headers; Send data using POST and PUT requests with JSON payloads and custom headers; Manage API authentication methods including Basic Auth and Bearer tokens; Debug API errors by analyzing verbose output and HTTP status codes; Apply modern best practices for testing endpoints and automating basic API checks. This text-based course guides you step-by-step from raw terminal commands to structured API testing workflows. It is designed specifically for beginners with no prior command-line or API testing experience. Start reading today to build a practical, command-line-driven approach to API interaction.