I feel like this is a bit hacky, you can filter fields via URL like
api/collections/entries/collectionname?fields[_mby]=&fields[_by]=&fields[_modified]=&fields[_created]=
OR
api/collections/entries/collectionname?fields[name]=all&fields[_id]=all
There are two more methods to achieve it.
1
If you only want to grab a few fields, you can use graphql addon of Cockpit called CockpitQL
2
You can modify the entry fields with this below method.