Designing RESTful APIs with OpenAPI and Swagger

Well-designed APIs are the backbone of modern software architecture, but without clear documentation, they are difficult to integrate and maintain. Learning to build standardized, machine-readable specifications is the key to creating scalable and developer-friendly APIs. This text-based course guides you through the process of designing, documenting, and securing RESTful APIs using the industry-standard OpenAPI specification (formerly Swagger). You will transition from understanding basic HTTP concepts to writing production-ready API specifications in YAML that can be used to generate interactive documentation, mock servers, and client SDKs. What you'll learn: - Understand foundational HTTP concepts, RESTful principles, and how OpenAPI fits into the modern development lifecycle. - Write clean, structured API specifications using YAML and Swagger tooling. - Define API paths, parameters, and HTTP operations like GET, POST, PUT, and DELETE. - Create reusable schemas and data models using JSON Schema to ensure strict data validation. - Configure robust API security schemes, including API keys, Bearer tokens, and OAuth2 flows. - Apply API governance best practices by linting your specifications for consistency and quality. You will start with the fundamental building blocks of web services and HTTP before diving into hands-on specification writing. As you progress, you will explore advanced topics like reusable components, security definitions, and modern tools for generating interactive documentation. This course is designed for beginners, including developers, technical writers, and product managers looking to master API design. No prior experience with OpenAPI or Swagger is required, though a basic familiarity with JSON or YAML is helpful. Start writing clear, professional API specifications today.