To ensure compatibility, I would recommend keeping your client library in sync with the version of FusionAuth.
For example, if you have 1.21.0 installed, that would mean ensuring you use the 1.21.0 version of the Python client.
All of our client libraries are open source (Apache2 license). At present we use this open source project to build them.
If you are interested in support for a language (let's say Lisp, because it's so cool 🙂 ), then take the following steps:
If you want to take a crack at building the Lisp library, please file an issue as above and indicate your desire to help. How it works: