The Flexmonster custom data source API is a communication protocol that allows retrieving already aggregated data from a server to Flexmonster Pivot.
To fetch the data from the server, Flexmonster sends POST requests to the API endpoints in JSON format.
|<url>/handshake||(optional) the first request to establish a connection between the client and server sides|
|<url>/fields||request for all fields with their types|
|<url>/members||request for all members of the field|
|<url>/select||request for data, can be for pivot table, flat table, and drill-through view|