This presentation introduces the pg_featureserv program. It is lightweight, written in Go, and is used to publish vector data from PostGIS databases using the OGC API features standard. First, the main features of pg_featureserv are presented, including installation and setup. Special attention is given to the tool's numerous filter functions, which allow precise and efficient queries of spatial data. The usage of these functions is explained with examples. In addition, the OGC API Features standard is presented as an alternative to the traditional WFS for publishing spatial data. The differences between the two approaches are explained and the advantages of the new standard are highlighted.