Since it's not linked from any https://github.com/fernet/ project as far as I could tell, and I had to google for it.
Clojure implementation:
https://github.com/derwolfe/fernet-clj
I also found a JavaScript implementation:
This looks very much like the approach to session-data-in-encrypted-and-signed-cookie I've seen used to great success in lots of places (where for a stateless-ish API the contents are just a user id or whatever).
Am I right that this would work fine both in that or in e.g. a query parameter?
(sorry if I'm asking really stupid questions, but I'd rather look stupid than accidentally a security hole)
https://github.com/fernet/spec/blob/master/Spec.md
Fernet was written originally for Python but there's a Ruby implementation, a Golang implementation, and a Clojure implementation. I believe that for at least 80% of applications considering JWT, Fernet provides exactly the right amount of functionality, and does so far more safely than JWT.