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/78d23fac178ce5daa2ad75525da88146d138d58b4f07649f8b6414fbfa115a33-primary.sqlite.bz2
Development files for xdg-desktop-portal
The pkg-config file for xdg-desktop-portal.