(500) Internal Server Error - When sending web request using api

Question

I am sending a web request and getting internal server error : 500.

How can i be sure what side is responsible for getting this error? My side or the external api side?

I didn`t see logs in my event viewer.

This is my code:

var request = WebRequest.Create("http://saas.appoxee.com/api/") as HttpWebRequest;
request.Method = WebRequestMethods.Http.Post;
request.ContentType = "application/json";

// Add the content to the request
string postDataJsonFormat = CreateExampleTagRequest();
byte[] byteArray = Encoding.UTF8.GetBytes(postDataJsonFormat);
request.ContentLength = byteArray.Length;

Stream dataStream = request.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();

// Getting and processing the response
var response = request.GetResponse() as HttpWebResponse;

Solution

"500.0 – Internal Server Error" is an IIS Error code meaning that the web service is unavailable. This means the error is with the API, not your client.

Summary of server codes:

1xx - Informational

2xx - Success

3xx - Redirection

4xx - Client error

5xx - Server error

For a full list of codes look here: http://support.microsoft.com/kb/943891 and about the 500 code specifically: http://support.microsoft.com/kb/942031