Topic
media & communities
Hacker News front page and comment threads as JSON, ranked and flattened
Front page stories in rank order with points and comment counts, or one thread with its comments flattened and a depth on each. Two GET requests.
Get YouTube video metadata (views, likes, duration) with one GET request, no Google API key
Title, channel, views, likes, length, publish date, thumbnails and keywords for any public video, from one request. And when the official Data API is better.