
Cruise sailings, day-by-day itineraries, weekly fare history, port traffic and a cruise price index.
Cruise Itinerary API is a free Transportation API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
Quickstart, authentication, errors, limits, webhooks and every endpoint of the Cruise Itinerary API.
Details from cruise-itinerary.com.

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The Cruise Itinerary API is provided by Cruise Itinerary (cruise-itinerary.com). Quickstart, authentication, errors, limits, webhooks and every endpoint of the Cruise Itinerary API.
Yes. The Cruise Itinerary 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.
Yes. The Cruise Itinerary API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The Cruise Itinerary API supports CORS, so front-end JavaScript can call it directly.
Yes. The Cruise Itinerary API is served over HTTPS, so it's safe to use in production.