Rapid API gives you access to thousands of APIs published on its marketplace by third-party developers. The cool thing is that you only need one API key, Rapi API’s key, to authenticate with all the APIs marketed on Rapid API. Some of them are free but most of them will require a premium subscription. The developer gets 80% of the revenue made through the marketplace.
developers with a basic understanding of the API concept, who want to easily access a wide variety of services without the hassle of having to sign up for each API separately. You only need one key to access all APIs. Very smart concept!