HttpClient

noun

say it: “AYCH-TEE-TEE-PEE KLY-ent” /ˌeɪtʃ tiː tiː ˈpiː ˈklaɪənt/

The .NET class that sends HTTP requests from C# code and returns the responses.

What is HttpClient in C#?

HttpClient — The .NET class your C# code uses to call a web API: it sends GET, POST, PUT and DELETE requests and gives back the responses. Create one and reuse it, rather than one per request.

HttpClient client = new() { BaseAddress = new Uri("http://localhost:5000/") };
List<Product>? products = await client.GetFromJsonAsync<List<Product>>("api/products");
Console.WriteLine(products?.Count);

In a sentence

• “Our console app uses HttpClient to read products from the API.”

Level: Journeyman · More C# terms at this level

Updated October 28, 2026