Live stock market news with tagged tickers + sentiment and stats JSON API.
MarketAux API is a free News API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
Free finance and stock market news and analysis API in JSON format for over 80 markets and over 5,000 sources.
Details from marketaux.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.
The New York Times Developer Network
Each Country separately and Worldwide Graphs for Coronavirus. Daily updates
The MarketAux API is provided by marketaux (marketaux.com). Free finance and stock market news and analysis API in JSON format for over 80 markets and over 5,000 sources.
Yes. The MarketAux 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 MarketAux API uses apiKey authentication, so you need to register for credentials before making requests.
Yes. The MarketAux API supports CORS, so front-end JavaScript can call it directly.
Yes. The MarketAux API is served over HTTPS, so it's safe to use in production.