There are a few apps that use it already, it's pretty simple in design: put the NUT in an X-Cashu header, make the middleware read and receive it, and let the request through. I'm not aware of a comprehensive middleware that you can just plug and play but there are many libraries available depending on what you're building.

check this out: https://proxnut.com/ 

 Thanks for the reference!

This is the screen I get when I click “discover more” @marc0 

But I’ll keep looking into it
https://m.primal.net/LMFL.png