Hi, 
I'm trying to filter Documents by metadatas using Headless Delivery API's, /v1.0/sites/{siteId}/documents in particular.

Reading that post https://help.liferay.com/hc/en-us/articles/360039026232-Filterable-properties, I've understood 
that I can't filter documents by metadata. 

The search by keyword works on metadatas, but not the filter on specific metadatas.

How can I handle it?

Thanks.