when I try to this https://accounts.zoho.com/apiauthtoken/nb/create?SCOPE=ZohoCRM/crmapi&EMAIL_ID=pin2kumhar@gmail.com&PASSWORD=zoho@123

return    # #Wed Aug 20 23:41:34 PDT 2014 CAUSE=WEB_LOGIN_REQUIRED RESULT=FALSE

Be logged in or not its not mandatory