This is a fairly simple one. It returns all the channel and shared emotes on your channel. It's useful if you'd like to list the emotes available on the channel, but don't want to update the command every time you change your shared emotes.
The api link is:https://twitch.center/customapi/bttvemotes?channel=CHANNEL
Example usage:!commands add !bttvemotes $(urlfetch https://twitch.center/customapi/bttvemotes?channel=$(channel))
There's an optional separator argument you can add to specify the separator between emotes. For example &separator=+-+ would return something like so (note that + is space here in URL encoding):
emote1 - emote2 - emote3
Results are cached, so there won't be instant update as you change emotes.
If there's enough demand, I could also potentially make one for Twitch sub emotes, although those change less often. Still useful to have a command and not worry about it getting outdated.

