
Educational content about the US Health Insurance Marketplace.
Healthcare.gov API is a free Health API that requires no API key, is served over HTTPS and has unconfirmed CORS support.
HealthCare.gov for Developers
Details from healthcare.gov.

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The Healthcare.gov API is provided by HealthCare.gov (healthcare.gov). HealthCare.gov for Developers
Yes. The Healthcare.gov 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.
No. The Healthcare.gov API requires no authentication, so you can start making requests without signing up.
CORS support for the Healthcare.gov API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Healthcare.gov API is served over HTTPS, so it's safe to use in production.