Mastering OpenAPI in C#: Building Scalable and Well-Documented APIs

APIs play a crucial role in modern software development, enabling seamless communication between applications, services, and third-party integrations. As APIs become more complex, the need for clear, standardized, and well-documented specifications has grown significantly. OpenAPI has emerged as the industry standard for defining, documenting, and consuming APIs, making it easier for developers to design scalable and maintainable web services.
This book is a comprehensive guide to Mastering OpenAPI in C#, covering everything from API design principles to advanced implementation techniques using ASP.NET Core. Whether you are a beginner looking to build your first API or an experienced developer aiming to improve API documentation, security, and performance, this book provides the knowledge and best practices needed to build professional-grade APIs.
By using Swashbuckle, NSwag, and other OpenAPI tools, you will learn how to automate API documentation, generate client SDKs, and integrate APIs with frontend applications. The book also covers essential topics like API authentication, versioning, security, and performance optimization, ensuring that your APIs are both efficient and secure.
What You Will Learn:

• Understanding OpenAPI and why it is essential for API development
• Setting up an ASP.NET Core Web API project with OpenAPI support
• Documenting APIs with Swashbuckle and customizing Swagger UI
• Creating well-structured API endpoints and defining request-response models
• Implementing authentication and authorization using OAuth2, JWT, and API keys
• Managing API versioning and backward compatibility
• Generating client SDKs using NSwag and OpenAPI Generator
• Testing and debugging APIs using Postman, Swagger UI, and xUnit
• Performance optimization techniques, including caching and rate limiting
• Deploying APIs to Azure, AWS, Docker, and Kubernetes
• Best practices for designing scalable, secure, and maintainable APIs

Mastering OpenAPI in C#: Building Scalable and Well-Documented APIs : A Comprehensive Guide to Designing, Developing, and Documenting APIs with OpenAPI and C#

This book is suitable for software developers, API engineers, software architects, and DevOps professionals who work with ASP.NET Core Web API and want to leverage OpenAPI to improve API quality and usability.
With hands-on tutorials, step-by-step instructions, and real-world examples, you will gain practical experience in building high-quality APIs using OpenAPI and C#. Whether you are developing microservices, cloud applications, or enterprise APIs, this book provides you with the tools and strategies to create well-documented, secure, and scalable APIs that are easy to maintain and integrate.
By the end of this book, you will be able to confidently design, document, and deploy OpenAPI-based APIs, ensuring that your services are efficient, reliable, and ready for real-world use.