Where can I pay a lightning invoice to to get bearer key that I can use on routstr?

Where can I pay a lightning invoice to to get bearer key that I can use on routstr?

Bearer key? Lightning invoice?
Your request, granted:
Use nutshell as a library.
You want a mint call.
I'm asking from the perspective of a normal non-dev user who just knows how to send lightning invoices. I don't want to have to install libraries and do function calls.
How does a normie use routstr when the normy only knows how to send lightning invoices?
If you can do API calls to access this, you can do one more to mint a token. Also, minibits or cashu.me will mint you tokens in exchange for lightning invoice in a normie friendly way.
If you are a normie, you need a user interface that someone builds for you and shows you the invoice. Athenut does this in a nice way, you don't even see tokens, only the invoice.
But please don't be a normie. If you can use AI, you can use the library. Learn. Normies will have a very hard time in what's coming at them. The normie way leads to a Disneyland themed gulag. You should expect more of yourself and for yourself.