Many top-level API resources have support for bulk fetches through “list” API methods. For example, you can list payments and refunds. These list API methods share a common structure and accept, at a minimum, the following optional parameters are supported:

page: Used to indicate what results to return, use a value from the nextPage
property returned from a prior call to the list API. If omitted the first page of results are returned.
pageSize: indicates how many results to return per page.

The response from a list API method includes the following properties:

An optional nextPage property containing a string-based token that acts as the
cursor that a client can use as an input to subsequent API calls to request
the next page of data.
A hasNext property containing a boolean flag to indicate whether or not there
are additional results available after the current page.
A pageSize property indicating the size of the page being returned. This
does not have to equal the number of items in the collection. E.g. a page
size of 10 items could be returned but, for the final page, only 5 items
could be returned to the client.