
Clash Royale Game Information.
Clash Royale API is a free Games & Comics API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
Enter the Arena with Clash Royale API. Build amazing experiences with access to accurate and secure game data.
Details from developer.clashroyale.com.

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The Clash Royale API is provided by Clash Royale API (developer.clashroyale.com). Enter the Arena with Clash Royale API. Build amazing experiences with access to accurate and secure game data.
Yes. The Clash Royale API is listed in the Games & Comics 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 Clash Royale API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the Clash Royale API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Clash Royale API is served over HTTPS, so it's safe to use in production.