Added demo.
Due to excessive calls, now the API is managed by RapidAPI. You can get an API Key here.
From February 28th the existing API Keys (the one that you're using right now) will be deactivated, and you no longer will be able to continue conversions with that key. In order to continue using the service, please go and subscribe for a new API Key here and update either the Client connector or your API Endpoints.