OKEx
Cryptocurrency exchange based in Seychelles
Turkish cryptocurrency exchange with real-time market data, trading and WebSocket streams.
Paribu API is a free Cryptocurrency API that requires apiKey authentication, is served over HTTPS and does not support CORS, so it should be called from a server.
Details from docs.paribu.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 Paribu API is provided by Paribu API (docs.paribu.com).
Yes. The Paribu API is listed in the Cryptocurrency 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 Paribu API uses apiKey authentication, so you need to register for credentials before making requests.
Not directly. The Paribu API does not allow CORS, so call it from a server, serverless function or proxy instead of front-end JavaScript.
Yes. The Paribu API is served over HTTPS, so it's safe to use in production.