ASP.NET Core & REST APIs

From zero to hero. Learn what APIs are, how the internet communicates, and how to build your own secure APIs using C# and ASP.NET Core. No prior API knowledge required!

1What is an API?

Understand the basics of APIs using a simple restaurant story, and see how they relate to C#.

Beginner 15 min
2What is REST?

Learn the rules of REST APIs and how the internet uses HTTP to communicate.

Beginner 15 min
3Creating Your First Web API

Set up a Web API project in Visual Studio and write your first API endpoint.

Intermediate 20 min
4Mastering HTTP Methods

Deep dive into GET, POST, PUT, and DELETE with real C# examples.

Intermediate 25 min
5JSON & Serialization

Understand the language of APIs (JSON) and how to convert C# objects to JSON.

Intermediate 15 min
6Consuming an API

Learn how to use C# to talk to other APIs using HttpClient.

Intermediate 20 min
7Routing & Parameters

Pass data from the URL directly to your C# methods using [FromRoute] and [FromQuery].

Intermediate 20 min
8Status Codes & Errors

Master HTTP Status codes (200, 404, 500) and how to handle errors gracefully.

Advanced 20 min
9Dependency Injection

Keep your API clean by injecting database services into your controllers.

Advanced 25 min
10Securing Your API

Learn how to protect your API using API Keys and JWT Authentication.

Advanced 30 min
Lessons
Test Your Knowledge - Take Quiz