Open APIs that deliver services in or regarding Iceland.
Icelandic APIs API is a free Transportation API that requires no API key, is served over HTTPS and has unconfirmed CORS support.
Details from docs.apis.is.

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Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
Hotel content, rates and room bookings
Audio guide for travellers
The Icelandic APIs API is provided by apis.is (docs.apis.is).
Yes. The Icelandic APIs API is listed in the Transportation 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 Icelandic APIs API requires no authentication, so you can start making requests without signing up.
CORS support for the Icelandic APIs API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Icelandic APIs API is served over HTTPS, so it's safe to use in production.