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Edamam API is a free Health API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
Details from developer.edamam.com.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
Cited gene, variant and CPIC drug-gene lookups for developers and AI agents
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The Edamam API is provided by Edamam (developer.edamam.com).
Yes. The Edamam API is listed in the Health 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 Edamam API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the Edamam API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Edamam API is served over HTTPS, so it's safe to use in production.