FanLine Wire
Real-time FanDuel Sportsbook odds — live & in-play and pre-match, with a keyless public snapshot
MLB since 2015 plus college baseball: pitches, plate appearances, box scores and sportsbook odds.
FastballAPI 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.
Full API reference for FastballAPI. 20 baseball data endpoints with parameters, example requests, and response shapes.
Details from fastballapi.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.
Real-time FanDuel Sportsbook odds — live & in-play and pre-match, with a keyless public snapshot
F1 data from the beginning of the world championships in 1950
NBA, WNBA and college basketball: play-by-play, shot locations, box scores and sportsbook odds
Embed codes for goals and highlights from Premier League, Bundesliga, Serie A and many more
The FastballAPI is provided by FastballAPI (fastballapi.com). Full API reference for FastballAPI. 20 baseball data endpoints with parameters, example requests, and response shapes.
Yes. The FastballAPI 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 FastballAPI uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The FastballAPI supports CORS, so front-end JavaScript can call it directly.
Yes. The FastballAPI is served over HTTPS, so it's safe to use in production.