
Random dog facts.
Dog Facts API is a free Animals API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Details from dukengn.github.io.

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The Dog Facts API is provided by dukengn.github.io (dukengn.github.io).
Yes. The Dog Facts API is listed in the Animals category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
No. The Dog Facts API requires no authentication, so you can start making requests without signing up.
Yes. The Dog Facts API supports CORS, so front-end JavaScript can call it directly.
Yes. The Dog Facts API is served over HTTPS, so it's safe to use in production.