Create and Run ASP.NET Core Web API (.NET 9) with NSwag and Swagger UI | Add JWT Authentication

🚀 In this tutorial, we will guide you step-by-step on how to: 1️⃣ Create an ASP.NET Core Web API project using .NET 9.
2️⃣ Configure NSwag and Swagger UI to automatically generate API documentation and client code.
3️⃣ Implement JWT Authentication for secure API endpoints.
4️⃣ Integrate authentication flow into Swagger UI for testing secured endpoints.

📘 Topics Covered:

Setting up a .NET 9 Web API project
Adding and configuring Swagger and NSwag
Generating and customizing API documentation
Implementing JWT Authentication
Protecting API endpoints with [Authorize] attributes
Testing secured endpoints via Swagger UI
💡 By the end of this video, you'll have a fully functional API with JWT-secured endpoints and interactive documentation using NSwag and Swagger.

Tags:
#ASP.NET Core Web API
#.NET 9
#NSwag
#Swagger UI
#JWT Authentication
#Secured Web API
#ASP.NET Core Tutorial
#API Documentation
#RESTful API
#Swagger Authentication
#.NET Development
#Secure API Development
#JSON Web Token
#ASP.NET Beginner Guide
#API Testing
#Visual Studio 2025
#.NET 9 Features
#Web API with JWT