What is an API?

An application programming interface is a link between two computers or computer programs. It is a type of software interface that provides a service to other programs. An API specification is a document or standard that describes how to create or use such a connection or interface.

Subscription plus APIs:

In this document, you can find linked cyberspace that hosts all the API documentation and relevant code snippets, where you can test and copy relevant codes.

You can visit the relevant documentation from this link: https://app.subscriptionplus.net/docs/?javascript#introduction