Problem 401 unauthorize twitter api 1.1 (



I have a problem while trying to authenticate to Twitter API.

I based on Suresh implementation :

My urls are :

public const string REQUEST_TOKEN = “”;
public const string AUTHORIZE = “”;
public const string ACCESS_TOKEN = “”;

Here is the result of my signature base:


Here is my request :

I I paste this value to my browser, I receive “Failed to validate oauth signature and token”

The time is correctly configure and the credentials are the good ones for sure.

I’m actually working on localhost and I don’t fill the callback.

Is somebody got an idea on that problems?

Thank you very much!


I also change the credential url as :