Sometimes I run long scripts on a remote machine and I want to know when they finish. It's not urgent enough that I need a text or toot, but being able to pull up a simple page that shows what is done and not done makes it easy to check periodically.
This tiny Python 3 Flask API runs on a server (Raspberry Pi, etc.). It has very basic authentication and waits for a curl (or similar) GET request with some small amount of data. The data are displayed on a simple web page.
The reason for a simple GET request is to make this as code-agnostic as possible. Drop a curl command into R or Python or Go or Ruby or whatever (I assume) and be able to watch whatever data you pass.
You can either run with the internal Flask development server or something like gunicorn.
I am experimenting with virtualenv, for which I am following the instructions at https://blog.miguelgrinberg.com/post/designing-a-restful-api-with-python-and-flask (this is also the place from I cribbed the basic application functions).
I'm sure there are some.
I'm sure this isn't very secure. It has basic data cleaning, string length limits, and username/password protection. There is no database--all data are kept in memory and will disappear when the server is stopped. Use at your own risk, don't reuse passwords, and obviously don't pass data that can't be shared openly online. The last part includes things like "front_door_unlocked"--use common sense.