Allow sequential API get requests for event list greater than 500

[SCORESD]

I am unable to retrieve some new events being added (all of which begin with alphabet letters U-Z), since the API GET limit is 500.  Obviously, I am unable to determine how many events I actually have stored, but the PHP 'count($events->results)' is exactly 500 (which explains why some events are missing). 

Since 500 is the limit to optimize back-end data retrieval, is there a way to run sequential API GET requests to retrieve the next 500 events (501-1000)?  If not, can Constant Contact archive events from 6 years ago (which are included in the 500 being retrieved) so new events are available.  Incidentally, this problem only exists with the REST API (which I use to create workshop sign-in sheets).  The Constant Contact website widgets show all the new events just fine.

[SCORESD · Accepted solution]

Follow-up.  My original PHP code included a pagination loop, but I had made a small error in concatenating the URL for the "next=" loop.  The problem showed up when the workshop count exceeded 500, but it is fixed now.