in reply to
Perl + vimeo | Getting error in authenticating advanced API's
Does $request->to_url produce the same output as what you are doing manually? And do you have some other way of checking if the key is valid?
$str = uri_escape( $str) ;
This looks rather dubious to me. You are also URL-escaping the & separators, even though you probably shouldn't do that. Instead URI-escape each parameter individually.
my $v_search_url = "http://vimeo.com/api/rest/v2? method=$method...";
Are you sure there needs to be a spasce after the question mark?