From the drop-down, select 'System Configuration'.
Enter Your credentials to log in to Signals NB as Administrator User.
Once You have logged in as an Administrator User, select "System Settings"--> "API Key"--> "Open API Document". This will open Swagger user interface page.
You can find some more information in our System Configuration Guide:
As an Administrator User, click on Your name on the right-hand top corner.
From the drop-down select 'System Configuration Guide'.
On the right-hand top corner search for 'Swagger'. It will return "External Notifications" and "Query Operators in Search APIs".
