Why does adding okta authentication authorization to asp net core webapi with re


ASP.NET is a popular programming language used for building web applications. One common requirement in web development is adding authentication and authorization to secure the application. In this article, we will explore how to add Okta authentication and authorization to an ASP.NET Core WebAPI with the help of examples.

Setting up Okta

Before we dive into the code, let's first set up Okta for authentication and authorization. Okta is a cloud- identity management platform that provides secure user authentication and authorization services.

To get started, sign up for an Okta and create a new application. Note down the Client ID and Client Secret, as we will need them later in our code.

Configuring ASP.NET Core WebAPI

First, let's create a new ASP.NET Core WebAPI project. Open Visual and select “Create a new project.” Choose the ASP.NET Core WebAPI template and proceed with the project creation.

Once the project is created, open the Startup.cs file. This file contains the configuration for our application.

Inside the ConfigureServices method, add the following code to configure Okta authentication:

services.AddAuthentication(options =>
    options.DefaultAuthenticateScheme = OktaDefaults.ApiAuthenticationScheme;
    options.DefaultChallengeScheme = OktaDefaults.ApiAuthenticationScheme;
}).AddOktaWebApi(new OktaWebApiOptions()
    OktaDomain = Configuration["Okta:Domain"],
    Audience = Configuration["Okta:Audience"]

Make sure to replace Configuration["Okta:Domain"] and Configuration["Okta:Audience"] with the appropriate from your Okta application configuration.

Securing API Endpoints

Now that we have configured Okta authentication, let's secure our API endpoints. Open the Controllers folder and select the controller you want to secure.

Inside the controller class, add the [Authorize] attribute to the or the entire class to require authentication for accessing those endpoints. Here's an example:

 class UsersController : ControllerBase
    public IActionResult Get()
        // Code to retrieve users

    public IActionResult Create(User user)
        // Code to create a new user

By adding the [Authorize] attribute, only authenticated users will be able to access the Get and Create methods.

Testing the Authentication

Now that we have configured authentication and secured our API endpoints, let's test it. the application and make a request to one of the secured endpoints.

If you are using a tool like Postman, include the access token in the request . The access token can be obtained by authenticating with Okta using the appropriate credentials.

If the request is successful, you will receive the expected response. Otherwise, you will receive a 401 Unauthorized status code.


In this article, we explored how to add Okta authentication and authorization to an ASP.NET Core WebAPI. We learned how to configure Okta in our application, secure API endpoints, and test the authentication. By following steps, you can enhance the security of your ASP.NET Core WebAPI with Okta.

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