Using the Stack Overflow javascript authentication API, I get this error:

Application Login Failure An error occurred while login into an application.

Error Details
error description: could not parse proxy url

I checked regarding this issue and I found a few URLs:

• Bug in the StackExchange Api ? getting "could not parse proxy url" when user not logged in
• Resurfacing bug: "could not parse proxy url" error message

Still I could not solve this.

Is there any other way apart from javascript Authentication to get an user's Stack Overflow reputation?

Please do help me on this.