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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="Clans.cfg_Rust_Extended|24" />
  </query-continue>
  <query>
    <pages>
      <page pageid="17" ns="0" title="Rust Extended" />
      <page pageid="18" ns="0" title="Список игровых команд Rust Extended" />
      <page pageid="19" ns="0" title="Ranks.cfg Rust Extended" />
      <page pageid="20" ns="0" title="Config.cfg Rust Extended" />
      <page pageid="21" ns="14" title="Категория:Rust Extended" />
      <page pageid="23" ns="0" title="Forbidden.cfg Rust Extended" />
      <page pageid="502" ns="14" title="Категория:Forge" />
      <page pageid="508" ns="0" title="Плагины Minecraft" />
      <page pageid="509" ns="0" title="Minecraft Cauldron" />
      <page pageid="513" ns="0" title="Minecraft Sponge" />
    </pages>
  </query>
</api>