The url must be the root url of Lidarr, Radarr or Sonarr application.
The Lidarr, Radarr or Sonarr API key can be found in Settings > General. It is needed to access the API.
+If you are using an older version of Radarr or Sonarr which don't support the new V3 api endpoints, add the following line to your service config "legacyApi: true", example:
+
+```yaml
+- name: "Radarr"
+ type: "Radarr"
+ url: "http://localhost:8989/"
+ apikey: "MY-SUPER-SECRET-API-KEY"
+ target: "_blank" # optional html tag target attribute
+ legacyApi: true
+```
## PaperlessNG