Which are the best API documentations you know? Comprehensiveness, Readability, Usability/UX, Look&Feel, extensive use of standards... whatever factor makes it special/favourable.
Looking for role models.
This is a good overview of the different things that make up great docs: https://zapier.com/engineering/great-documentation-examples/
I think a great developer docs experience is a really tough thing to do well. You need to have great design, great writing, and great tech. The existing docs platforms out there (like Readme.io) all suck (especially for anything beyond REST API docs), so you really need to roll your own.
I've done some consulting in this area for clients who wanted amazing docs experiences, so ping me if you want some more ideas / feedback.
For my own API (https://geocoder.opencagedata.com/api) it's hand-coded because the output of the tools are too complex when you have only 1-2 methods.
All those tools are good at what they do. When you want to do something very specific/custom, you will always end up needing something outside the scope of those products.
So far at Algolia, middleman is the one we're using for our main documentation. We had to tweak it a lot and reimplement some parts but it works and we should be able to keep it running for a while.
Basically, when you create a table and see its api documentation, it is generated on the fly to show you the rest endpoints specific to that table only.
Pretty awesome actually, worth checking it out.
Stripe has good api docs too.
Amazing IoT startup and amazing documentation