Open data about nobel prizes and events.
Nobel Prize API is a free Open Data API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Details from nobelprize.org.

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The Nobel Prize API is provided by NobelPrize.org (nobelprize.org).
Yes. The Nobel Prize API is listed in the Open 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 Nobel Prize API requires no authentication, so you can start making requests without signing up.
Yes. The Nobel Prize API supports CORS, so front-end JavaScript can call it directly.
Yes. The Nobel Prize API is served over HTTPS, so it's safe to use in production.