ApiMedic
ApiMedic offers a medical symptom checker API primarily for patients
NFL and NBA fantasy rankings and player projections.
Ball Ranks API is a free Sports & Fitness API that requires no API key, is served over HTTPS and supports CORS, so it can be called from the browser.
Build with Ball Ranks fantasy football and basketball rankings and projections using the public REST API or read-only MCP server.
Details from ballranks.com.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
ApiMedic offers a medical symptom checker API primarily for patients
ATP and WTA tennis since 2007: match results, draws, rankings, head to head, surface Elo and odds
PGA Tour golf since 2001: leaderboards, hole-by-hole scores, courses, ratings and major winner odds
The Ball Ranks API is provided by Ball Ranks (ballranks.com). Build with Ball Ranks fantasy football and basketball rankings and projections using the public REST API or read-only MCP server.
Yes. The Ball Ranks 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.
No. The Ball Ranks API requires no authentication, so you can start making requests without signing up.
Yes. The Ball Ranks API supports CORS, so front-end JavaScript can call it directly.
Yes. The Ball Ranks API is served over HTTPS, so it's safe to use in production.