# cto.conf
{
    WFHost => 'http://10.4.33.117/thinclient/MyService.asmx',
}

# helpers
package Cto::Helpers;
use base 'Mojolicious::Plugin';
use Mojolicious::Plugin::Config;

sub register {
$app->helper(
        WFrequest => sub {
            my ($self, $method, $body) = @_;
            my $config = $self->plugin('Config');

            my $result = {};
            my $wf_url = $config->{'WFHost'};
            ...
        }
    );
}
1;