We’re rewarding the question askers & reputations are being recalculated! Read more.
2 of 4 added 681 characters in body

It means that you enable objects to be accessed through some means. In your examples, you could let the users create, read, update or delete objects (usually abbreviated to CRUD) using HTTP protocol, using a predefined way to interact with your objects (an API).

That API can adhere to a set of rules - e.g. RESTful APIs use HTTP verbs, to perform some actions on objects and adhere to some principles that say how resources should be identified/represented and how they should be manipulated through those representations.