There are many acronyms and definitions in the world of the API so we have put together a short list containing the most used terms...
Application Programming Interface (API) is a specification used as an interface by software components to allow them to communicate with each other.
API key and API secret -
The API key and secret will be sent to you in separate emails before you start developing. Note that the API key is mandatory and must be used on every API request while the secret is optional and may be required depending on the security profile of the API.