On the read-side I had to coerce the type of the marker to 'int' and on the send side I had to send the marker as 'string' and this makes everything happy.

Author: clwells

src/Common/Resource/OperatorResource.php

@@ -80,7 +80,7 @@ public function enumerate(array $def, array $userVals = [], callable $mapFn = nu
 
         $requestFn = function ($marker) use ($operation, $userVals) {
             if ($marker) {
-                $userVals['marker'] = $marker;
+                $userVals['marker'] = (string)$marker;
             }
             return $this->sendRequest($operation, $userVals);
         };

src/Compute/v2/Api.php

@@ -644,12 +644,15 @@ public function getHypervisorStatistics(): array
 
     public function getHypervisors(): array
     {
+        $marker = $this->params->marker();
+        $marker['type'] = Params::INT_TYPE;
+
         return [
             'method' => 'GET',
             'path'   => 'os-hypervisors',
             'params' => [
                 'limit'  => $this->params->limit(),
-                'marker' => $this->params->marker()
+                'marker' => $marker
             ],
         ];
     }