API (Application Programming Interface) is a computing interface that defines the interaction between multiple software intermediaries.
API key is a specific identifier use authenticate the developer user and call programs for the API.
The API keys often serve as a specific identifier and a secret token for authentication, and usually have a set of access rights to the API associated with it.
These are commonly used to authenticate a project with an API instead of a human user. Different platforms can execute and use API keys in different ways.
