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>
    <alllinks galcontinue="VS.こち亀_こちら葛飾区亀有公園前派出所ノベライズアンソロジー" />
  </query-continue>
  <query>
    <pages>
      <page ns="0" title="H" missing="" />
      <page ns="0" title="MediaWiki" missing="" />
      <page ns="0" title="TO文庫" missing="" />
      <page pageid="4106" ns="0" title="C:sitedata" />
      <page pageid="4107" ns="0" title="C:sitedata/result" />
      <page pageid="1378" ns="0" title="Dr.ケリー" />
      <page pageid="698" ns="0" title="D規模蒸気式発電機" />
      <page pageid="1126" ns="0" title="MAGIUS魔術士オーフェン" />
      <page pageid="408" ns="0" title="SSW" />
      <page pageid="3202" ns="0" title="Sorcerous Stabber ORPHEN 魔術士オーフェン" />
    </pages>
  </query>
</api>