I’ve successfully created aggregated feeds using the hub.callback mechanism as described in your blog (https://blog.superfeedr.com/combining-feeds/).
However, your NodeJS library doesn’t describe how to pull aggregated feeds… I was able to pull single feeds (hub.topic), but can’t seem to get it to work with aggregated feeds… How can I make this work?
The Superfeedr NodeJS API only implements the Superfeedr XMPP API, not the "normal" one. The XMPP API does not support fetching combined feeds.