Is the data fed back by the APIs really only the data that the application needs when it is requested ?

Tests

Are the volumes of data transmitted commensurate with the presentation capabilities of the user device?

Precisions

The journeys and needs of users are very difficult to anticipate. One trend is to collect as much front end data as possible to cover as many use cases as possible. This practice is inefficient from an IT point of view. Sustainable because the collection, the processing, the routing, the local storage of the data generates a load and therefore a significant energy consumption without certainty that all this data will actually be used. The service footprint must be reduced by collecting only essential data as the service unfolds through API mechanisms.

Use Case

Developement tools are used to track API call & data sizes (CHROME: network)