> You could message the owner of phone directly through a URL. The request would be handled by server on phone!
I know it's not like a web server on the phone or anything, and likely questionable to mention it at all (since I made it), but I made a thing that lets you send notifications to a phone (or desktop) via curl [0] via a simple PUT or POST. It's definitely not a cool protocol since it's simple HTTP, but it's in the spirit of other Unix tools since it's just one thing to do one job.
I know it's not like a web server on the phone or anything, and likely questionable to mention it at all (since I made it), but I made a thing that lets you send notifications to a phone (or desktop) via curl [0] via a simple PUT or POST. It's definitely not a cool protocol since it's simple HTTP, but it's in the spirit of other Unix tools since it's just one thing to do one job.
[0] https://ntfy.sh