Ask HN: What is the best public API documentation you ever read?

In terms of usefulness, clarity and formal rigor, nothing really beats Sun’s Java v1.2 API documentation from 1998.

Example: https://javaalmanac.io/jdk/1.2/api/java/util/Collection.html

Not sure it would qualify for 'public API', as you're self-hosting it, but I'd like to nominate ZeroMQ documantation[0]. To the point, with occasional comedic remark, lots of examples. Excellent.

[0]: https://zguide.zeromq.org/