• author: Nick Chapsas

Building a REST API from Scratch: A Step-by-Step Guide

In this tutorial series, we will be taking a deep dive into building a REST API from scratch using ASP.NET Core 2.2. The API will adhere to standard architecture and guidelines, ensuring that it is a proper and fully functional RESTful API that can be used in any environment.

Setting up the Project

The first step in building the REST API is creating the project. Here are the steps to follow:

  1. Create a new ASP.NET Core Web Application.
  2. Name the application "TweetBook."
  3. Select the MVC template instead of the API template to enable individual user accounts.
  4. Delete unnecessary components like the HTTP root, areas, and MVC folders.
  5. Remove the IIS Express integration and run the application as an EXE.
  6. Update the application's database context.

Once you've completed these steps, you'll have set up the basic configuration for your REST API project.

Implementing Swagger

Swagger is a powerful tool that helps to document, test, and run web APIs effectively and efficiently. Here's how you can implement Swagger in the project:

  1. Install the Swashbuckle.AspNetCore NuGet package.
  2. Create a "SwaggerOptions" class to store Swagger configurations.
  3. Add the Swagger middleware to the project's "Configure" section.
  4. Configure the Swagger UI in the project's "ConfigureServices" section.
  5. Update the SwaggerOptions object and SwaggerDoc object with the appropriate values.
  6. Add the swagger generator to the project's services.

After following these steps, you will have enabled Swagger documentation using the Swashbuckle.AspNetCore package. You will also be able to test your API, and you can use the Swagger UI to access and run the API directly from a web browser.


Implementing a REST API can seem like a daunting task, but with the right tools and guidance, you can build a successful API from scratch. In this tutorial series, we've walked through the initial steps of creating a RESTful API and integrating Swagger. There is much more to explore when it comes to creating a successful API, including API route templates and versioning, so stay tuned for the next video in the series. If you found this tutorial helpful, please like, subscribe, and leave a comment. Happy coding!

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