I spent a few minutes Googling "OStatus spec". This Medium post [1] on the first page of results sums the prospects of this working nicely:

> Federated social networks such as Mastodon and GNUSocial communicate using a protocol known as ‘OStatus’. This is partly documented in an unfinished specification (the OStatus 1.0 Draft 2.0 document), and is otherwise defined by some parties as a non-living anti-standard which is ‘whatever it has been historically’, or the exact opposite ‘whatever it needs to be’, usually further qualified as ‘well, whatever my software, the one true use case, thinks it needs to be’.

[1] https://medium.com/@Rushyo/on-supporting-content-types-other...