Zero-auth REST endpoints for mock user profiles, UUIDs and HTTP status codes.
NovaFortix Dev API is a free Test Data API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Free, open, zero-auth public REST APIs for developers, students, and testers. No API keys required, CORS enabled, 100% free forever.
Details from public-dev-apis.surge.sh.

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API mocking tool to generate contextual, fake or random data
Random data generator
Yes. The NovaFortix Dev 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.
No. The NovaFortix Dev API requires no authentication, so you can start making requests without signing up.
Yes. The NovaFortix Dev API supports CORS, so front-end JavaScript can call it directly.
Yes. The NovaFortix Dev API is served over HTTPS, so it's safe to use in production.