You can call the OpenAI (ChatGPT) API using HttpClient in C#.
🔑 Get Your API Key
- Sign up at OpenAI and create a key.
🚀 Sample POST Request
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using System.Net.Http;
using System.Text;
using System.Text.Json;
var client = new HttpClient();
client.DefaultRequestHeaders.Add("Authorization", "Bearer YOUR_API_KEY");
var requestBody = new
{
model = "gpt-3.5-turbo",
messages = new[]
{
new { role = "user", content = "Hello, ChatGPT!" }
}
};
var content = new StringContent(JsonSerializer.Serialize(requestBody), Encoding.UTF8, "application/json");
var response = await client.PostAsync("https://api.openai.com/v1/chat/completions", content);
string responseJson = await response.Content.ReadAsStringAsync();
Console.WriteLine(responseJson);
📝 Tips
- Replace
YOUR_API_KEYwith your actual key. - Use
System.Text.JsonorNewtonsoft.Jsonto parse the response.
Next: Making API calls with HttpClient!
