How can I get a list of all apps for a given vendor ID, without having to ask for all addons and then check for the vendor ID?
The way I understood your question, your title already answered your question as it is the same as Get apps (by vendor). The refereced REST API will give you a list of apps by the vendor and you can filter the results. You can call it like
Is this enough for your use case?
Hmm, would seem so. Now I need to go figure out why I asked that dumb question…
No worries, @pslootweg.