The API returns JSON values per RFC 4627 and RFC 7159. null is a valid value. This allows clients to request only what they want: Entire item: https://hacker-n

The API returns JSON values per RFC 4627 and RFC 7159. null is a valid value. This allows clients to request only what they want: Entire item: https://hacker-news.firebaseio.com/v0/item/8422599.json https://hacker-news.firebaseio.com/v0/item/8422599.json Just one property: https://hacker-news.firebaseio.com/v0/item/8422599/kids.json https://hacker-news.firebaseio.com/v0/item/8422599/kids.json Also, please send API correspondence to api@ycombinator.com.