alt Hacker NewsWhat is an "official API"?
Honest question, because AFAIK there's no guarantee or (legal) requirement to support any API. Whether that's fully documented, has SDKs or whether it's something reversed-engineered doesn't matter WRT the support the company owning the API is supposed or required to give.
Or am I wrong there?
An official API is an API described in official documentation and explicitly open to the public, an unofficial one is one not documented publicly and only meant for the company's products.