Random Useless Facts vs TasteDive

Random Useless Facts is a free, keyless API that returns one trivia snippet at a time — random, "fact of the day", or lookup by ID — each with its own permalink and a source URL crediting the site it was pulled from (largely djtech.net). Responses come back as JSON by default, but requesting with an `Accept: text/plain` header returns the same fact formatted as plain Markdown-style text instead. There's no rate limiting, authentication, or paid tier — it's a small side project by its Polish maintainer.

TasteDive's recommendation API takes one or more seed items — movies, music, shows, books, games, people, places, or brands, optionally typed to disambiguate titles like "movie:Chaplin" — and returns similar items scored by TasteDive's own recommendation engine, with an optional verbose mode adding descriptions and YouTube links. It requires a free access key (`k` parameter) issued on request, capped at 300 requests per hour, and there's no paid tier beyond that shared rate limit. Responses are plain JSON with no CORS headers, so browser-side calls need a server-side proxy.