API Fundamentals and Testing with Postman

Understanding how application programming interfaces work is essential for modern developers, QA testers, and technical analysts. This text-based course provides a clear introduction to API design principles, protocols, and practical testing workflows. You will gain foundational knowledge of how systems communicate and learn to inspect endpoints, construct requests, and validate responses using Postman. What you'll learn: - Understand core API terminology, HTTP methods, status codes, and request-response cycles - Differentiate between architectural styles including REST, GraphQL, gRPC, SOAP, and WebSockets - Explore API documentation using Swagger and write automated request collections in Postman - Implement mock endpoints using tools like WireMock to simulate backend behaviors - Practice with modern authentication flows including OAuth2 protocols and JWT tokens - Learn basic observability principles using log management and telemetry tools like Kibana and Grafana. The course begins with core network concepts and HTTP fundamentals before moving into multi-protocol testing and microservice architecture patterns. Designed specifically for beginners and aspiring tech professionals, no prior programming experience is necessary. Begin your journey toward mastering web APIs and backend testing today.