request_token Error

I am trying to get oauth token, but getting an error. please advise what is wrong in my url. Thanks

Unauthorized.OAuth Verification Failed: Can’t verify request, missing oauth_consumer_key or oauth_token

Your URL looks fine to me - it there anything logged CMS side?

NB: If you are developing an API application you might want to consider running the 1.8 alpha release as the API has changed significantly.