Separate graphite host for client & server

We would like to use the direct mode in a Graphite data source, but also use Grafana’s alerting features based off a Graphite data source. Currently those both use the same URL, so clients request graph data from the same URL the Grafana server would request data inside our infrastructure. In our setup, those are two different URLs, so either we have to run proxy mode or we have to not have alerting. Is there a way to have different URLs for this purpose?

No way to have two urls.