qdbus Introspection

Plasma exposes most of its scriptable surface over D-Bus. qdbus6 (Plasma 6) / qdbus (Plasma 5) is the discovery tool.

Tooling

QD=$(command -v qdbus6 || command -v qdbus-qt6 || command -v qdbus)

busctl --user is a more powerful systemd alternative; useful when qdbus output is ambiguous.

List services

$QD                           # all services on the session bus
$QD | grep -i kde