Where can I ask questions like "which API has feature X?"

My first idea is Hacker News, unfortunately with the flow in /new it tends to be dropped fast if it's a niche question.

In this case, I'm looking for a scraping API that can give me structured data from a comment thread that's unstructured (like HN, for those who haven't looked, comment's aren't nested in the source). Maybe something that uses computer vision to determine structure?

Anyway, while an answer to that question would be great, this question is to ask about where would you go for such questions (subreddits, somewhere on StackExchange, other forums?)

Thank you all very much