chucknorris.io vs Random Useless Facts

chucknorris.io is a free, keyless JSON API serving hand-curated Chuck Norris jokes, either fully random or filtered across 16 categories (career, dev, movie, political, sport, and more). It also supports free-text search over the joke corpus and returns each joke with a permalink and an icon-URL field for quick embedding. There's no rate limit, no signup, and no paid tier — it's run as a hobby project on Heroku behind Cloudflare.

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.