[nickthegreek]

yes.

[nabakin]

I've used 'private API' exactly how you did and some pedant told me it wasn't a real term so I empathize

[beeboobaa]

HN is accessed via an undocumented public API that you are using every time you visit this site.

[tedunangst]

And I would suggest it's a bad idea to base your entire business off using that API.