The app framework API is documented here: http://docs.automotivelinux.org/docs/en/master/apis_services/reference/af-main/1-afm-daemons.html

But this is not up to date. It only refers to D-Bus and not to WS. Moreover, the WS API name is "afm-main", which is a name not mentioned in the D-Bus doc.

It should also be part of the API reference, like other services: http://docs.automotivelinux.org/docs/en/master/apis_services/reference/api-reference/0-api-introduction.html