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JsonFabrica API is a free Test Data API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
The JsonFabrica REST API: authentication model, base URL, error envelope, and every endpoint group.
Details from jsonfabrica.com.

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The JsonFabrica API is provided by JsonFabrica (jsonfabrica.com). The JsonFabrica REST API: authentication model, base URL, error envelope, and every endpoint group.
Yes. The JsonFabrica API is listed in the Test Data 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.
Yes. The JsonFabrica API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the JsonFabrica API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The JsonFabrica API is served over HTTPS, so it's safe to use in production.