
Word definitions with Scrabble validity and tile score in one call, built for word games.
WordSoHard API is a free Dictionaries API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
A free API built for word games: definitions with Scrabble validity and score, a batch Scrabble word checker, and an unscrambler with blank tiles. Keyless, CORS-enabled, no signup. Just credit WordSoHard.
Details from wordsohard.com.

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The WordSoHard API is provided by WordSoHard (wordsohard.com). A free API built for word games: definitions with Scrabble validity and score, a batch Scrabble word checker, and an unscrambler with blank tiles. Keyless, CORS-enabled, no signup. Just credit WordSoHard.
Yes. The WordSoHard API is listed in the Dictionaries 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 WordSoHard API requires no authentication, so you can start making requests without signing up.
Yes. The WordSoHard API supports CORS, so front-end JavaScript can call it directly.
Yes. The WordSoHard API is served over HTTPS, so it's safe to use in production.