Chris Aldrich shares a number of codes, including properties supported by microsub servers:

The WordPress Micropub server supports experimental properties so you can add &post-status=draft to your IFTTT webhook-based recipes for Micropub PESOS syndication.

And the ability to save a Tweet to Internet Archive:

If you want to Internet Archive a tweet, copy the long number (tweet ID) and stick it on the end of this: https://web.archive.org/save/https://twitter.com/intent/tweet?in_reply_to=