I looked into this, and it turned out to be a lot harder to do than I expected. I thought it should be pretty easy to stand up a simple web server and reply with that info, but … No.
I think if this were my project, I would instead make an app that always runs in the background and updates an MQTT server periodically, and I’d have my other system check that server instead. Alternatively, that app could just hit a web endpoint somewhere and POST the data to it, and that server could do whatever you want.
But as far as existing apps, I don’t see anything that does what you want.