If I understand the problem correctly, you're behind a firewall and the 403 you're getting is generated internally. You may be able resolve the problem by specifying the proxy server address in the environment. In the perl code, before the Net::Twitter->new call, add: $ENV{HTTP_PROXY} = $proxy_address; Where $proxy_address is the ip address of your proxy server. You can contact me directly via email: marc <at> questright.com.