
Live scores, play-by-play, schedules and odds for NFL, NBA, MLB, NHL, NCAA and soccer.
Realtime Sports API is a free Sports & Fitness API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
REST API, live scores, play-by-play, betting odds, webhooks, WebSocket, and code examples for developers.
Details from realtimesportsapi.com.

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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.
List of and resources related to sports
Crowd-source sports places around the world
Identify sport, brands and gear in an image. Also does image sports captioning
The Realtime Sports API is provided by Realtime Sports API (realtimesportsapi.com). REST API, live scores, play-by-play, betting odds, webhooks, WebSocket, and code examples for developers.
Yes. The Realtime Sports API is listed in the Sports & Fitness 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 Realtime Sports API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The Realtime Sports API supports CORS, so front-end JavaScript can call it directly.
Yes. The Realtime Sports API is served over HTTPS, so it's safe to use in production.