How to call third party rest api from asp net core web api

Introduction

ASP.NET is a popular programming language used for building web applications. One common requirement in web development is the need to call third-party REST APIs from an ASP.NET Core Web API. In this article, we will explore how to achieve this using ASP.NET Core.

Step 1: Install the packages

Before we can start calling a third-party REST API, we need to install the necessary packages. In this example, we will be using the HttpClient , which provides a convenient way to send HTTP and receive responses.


using System.Net.Http;

Step 2: a method to call the API

Next, we need to create a method that will handle the API call. This method should use the HttpClient class to send a request to the API and receive the response.


public  Task CallApi()
{
    using (HttpClient client = new HttpClient())
    {
        HttpResponseMessage response = await client.GetAsync("https://api.example.com");
        string result = await response.Content.ReadAsStringAsync();
        return result;
    }
}

Step 3: Call the API from your controller

Now that we have our method to call the API, we can use it in our ASP.NET Core Web API controller. Simply create an instance of the class containing the method and call it as .


[ApiController]
[Route("api/[controller]")]
public class ApiController : ControllerBase
{
    []
    public async Task Get()
    {
        ApiCaller apiCaller = new ApiCaller();
         result = await apiCaller.CallApi();
         Ok(result);
    }
}

Step 4: Test the API call

Finally, we can test our API call by running the ASP.NET Core Web API and sending a GET request to the route. If everything is set up correctly, we should receive the response from the third-party API.


GET /api/controller

Conclusion

Calling a third-party REST API from an ASP.NET Core Web API is a common requirement in web development. By following the steps outlined in this article, you can easily integrate external APIs into your ASP.NET Core applications.

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