Uri Teller is a perfect name, that's brilliant.

I created a similar idea a while back when Gmail started caching images. The main advantage is the image itself contains the log: http://cache-logger.herokuapp.com/hello-world

Code can be found here: https://github.com/kale/image-cache-logger

This is brilliant. They recommend using a url shortener, but I want to see if anyone is parsing comments and visiting urls from HN.

https://uriteller.io/7S6asCJSwrOzApjG84hIRA

Edited to add:

Here's the view key if you're interested. Just append it to the end of uriteller.io:

ZBt0gGoUHtIsyQ7KFwikYg

A crawler on AWS hit it two minutes after I posted it.