Simple solution. Not comprehensive, but it works without LWP.

use strict;
use IO::Socket::INET;
 
for (@ARGV){
 s|http://||; m|([^/]+)(.*)|;
 my $s=IO::Socket::INET->new(PeerAddr=>$1,PeerPort=>80,Proto=>'tcp',Ty
+pe=>SOCK_STREAM);
 print $s "GET ".($2||'/')." HTTP/1.0\nHost: $1 \n\n";
 print "Link $_ is validated\n" if <$s>=~/200 OK/;
 close $s;
}
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