While executing the Get API call, there are 200 records fetched on each page by default.

Pagination option can be used in order to fetch records for the specific page.

e.g. http://api.maropost.com/accounts/account_id/lists/list_id/contacts.xml?page=2&auth_token=xxxxxxxxxxxxxxxxxxxxxxxx

In the example above, page=2 has been passed which will display the next 200 entries for the call.