Page status API

Hi,
recently a blog post 7 ways to get your work noticed in Confluence - Work Life by Atlassian announced “custom page status” for Confluence.

Is there a way to read/write these statuses from Connect? Or is there an API for these status labels?

I think these would nicely integrate with workflow related API calls from addons.

Seems there is some unofficial way to get to know such status. I’m trying to clarify with Atlassian if this is reliable. They are storing the status as content property: escaped json with lots of markup. See Page content status / get and set via REST API