Recommendations for good SDK / API wrapper repos

Hello everyone,

Does anyone have recommendations for good examples of clean, well written SDKs or api wrappers? I’m looking for best practices, good patterns and whatnot. I have some ideas as a consumer of various libraries myself in that I want a clean api surface, sane configuration options, etc but I would love input on what other people look for, want, and in general have opinions on when designing these things. I have to create a library for consumers of our api/services and would love to glean what I can from great examples.