Micropublish now supports the proposed Micropub extension for Channels. If your server’s endpoint responds to ?q=channel, or your config has a channel property, you can use the new field.
While my current site doesn’t use channels, I’ve designed page management in my new, work-in-progress server to use the new proposal.
My 2017-01-01 IndieWeb commitment is to complete my rewrite of Micropublish to support Micropub updates, deletes and undeletes. My site’s Micropub endpoint supports these methods so I now need to bring my client up to date.