<?php require_once '../../csrest_clients.php'; $auth = array('access_token' => 'your access token', 'refresh_token' => 'your refresh token'); $wrap = new CS_REST_Clients('Your client ID', $auth); $result = $wrap->set_monthly_billing(array('Currency' => 'USD', 'ClientPays' => true, 'MarkupPercentage' => 100)); echo "Result of PUT /api/v3.1/clients/{id}/setmonthlybilling\n<br />"; if ($result->was_successful()) { echo "Updated with Code " . $result->http_status_code; } else { echo 'Failed with code ' . $result->http_status_code . "\n<br /><pre>"; var_dump($result->response); echo '</pre>'; }