xdg-desktop-portal works by exposing a series of D-Bus interfaces known as portals under a well-known name (org.freedesktop.portal.Desktop) and object path (/org/freedesktop/portal/desktop). The portal interfaces include APIs for file access, opening URIs, printing and others.
acquired package info from repodata DB: repodata/8a1c443463280ab9e921e11548112f19daf706d01b9c305f45f6945ee2253583-primary.sqlite.bz2
Development files for xdg-desktop-portal
The pkg-config file for xdg-desktop-portal.