You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allredirects garcontinue="Enable_Hardware_Unit_Ssd_Caching" />
  </query-continue>
  <query>
    <pages>
      <page pageid="2726" ns="0" title="CLI Guide Overview" />
      <page pageid="2692" ns="0" title="Call-home / Alerting" />
      <page pageid="2690" ns="0" title="Cloud Containers / NAS Gateway" />
      <page pageid="1227" ns="0" title="Clustered HA SAN/NAS Solutions using ZFS" />
      <page pageid="2704" ns="0" title="Clustered HA SAN/NAS with JBOD back-end Administrators Guide" />
      <page pageid="2705" ns="0" title="Clustered HA SAN/NAS with iSCSI/FC SAN back-end Administrators Guide" />
      <page pageid="2803" ns="0" title="Configure QuantaStor NAS Gateway Server" />
      <page pageid="2757" ns="0" title="Configure QuantaStor SAN/NAS Server" />
      <page pageid="2799" ns="0" title="Configure Scale-out Storage Cluster" />
      <page pageid="1277" ns="0" title="EULA" />
    </pages>
  </query>
</api>