Api Dispay Specific Metadata Elements

Dear all
I would like to find a way to display via api request /items , only some of the metadata elements. I would like to mirror the /items request API but only for displaying some of the metadata fields, because in some cases i don't want to give the full metadata.

Please could you give me a tip about that.

Regards
Athanasios

Let's keep this discussion on the list, where it started.