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.<p>[0]: <a href="https://zguide.zeromq.org/" rel="nofollow noreferrer">https://zguide.zeromq.org/</a>
In terms of usefulness, clarity and formal rigor, nothing really beats Sun’s Java v1.2 API documentation from 1998.<p>Example: <a href="https://javaalmanac.io/jdk/1.2/api/java/util/Collection.html" rel="nofollow noreferrer">https://javaalmanac.io/jdk/1.2/api/java/util/Collection.html</a>