I’ve never built it myself in Elixir, but you can look at other libs for inspiration. Look how ex_aws does it with json GitHub - ex-aws/ex_aws: A flexible, easy to use set of clients AWS APIs for Elixir · GitHub
Maybe @benwilson512 could give some tips how to structure such a pluggable library. He mentioned some ideas in the ExAws thread. I would love a discussion about a a good architecture for a library 
