OpenAPI and Swagger: Designing and Documenting REST APIs

Clear API documentation is the foundation of successful software integration. This text-based course guides you through the core concepts of the OpenAPI Specification and the Swagger ecosystem, helping you write readable, standardized API contracts. By reading and working through these lessons, you will transition from writing manual, unstructured API notes to designing professional, interactive API schemas that developers love to use. What you'll learn: - Understand the fundamental differences between OpenAPI and Swagger and how they fit into modern software development. - Write structured OpenAPI specifications using YAML and JSON to define paths, parameters, and responses. - Configure API security schemes, including API keys, JWT bearer tokens, and OAuth2 authorization flows. - Apply API-first design principles to plan and model interfaces before writing any application code. - Structure reusable components and schemas to keep your API documentation clean, modular, and easy to maintain. - Validate and lint your specifications to ensure compliance with industry-standard design patterns. You will start with foundational REST API concepts and terminology before gradually building a complete, production-ready specification through structured written exercises and realistic scenarios. This course is designed for beginner developers, technical writers, and product managers who want to learn API documentation from scratch, with no prior OpenAPI experience required. Start reading today to build clear, professional documentation for your next API project.