
RSS reader.
Feedbin API is a free News API that requires OAuth authentication, is served over HTTPS and has unconfirmed CORS support.
Feedbin API Documentation.
Details from github.com.

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The Feedbin API is provided by feedbin (github.com). Feedbin API Documentation.
Yes. The Feedbin API is listed in the News 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 Feedbin API uses OAuth authentication, so you need to register for credentials before making requests.
CORS support for the Feedbin API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Feedbin API is served over HTTPS, so it's safe to use in production.