Error on page should have given you the idea, it says:
ERROR: Invalid routine called. (5b97895d)

Which means, the subroutine you called is invalid. Looking at your url, you're calling 'sub=getaccountdetails_v1'. That's not correct. It is only 'getaccountdetails'. So change that to:
'sub=getaccountdetails' and it works.
Lifetalk Reviewed by Lifetalk on . How to call rapidshare API on browser? Hey guys, i tried this: http://api.rapidshare.com/cgi-bin/rsapi.cgi?sub=getaccountdetails_v1&withcookie=1&type=prem&login=XXXXX&password=XXXXX But it isn't working Rating: 5