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>
    <allfileusages gafcontinue="Forconi--ancora-protesta-terza-giornata-7.jpg|343" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="4" title="WikiMANNia:Pagina principale" />
      <page pageid="51" ns="4" title="WikiMANNia:Pagina principale/Articolo del giorno/Links" />
      <page pageid="127" ns="0" title="Wieviel &quot;Gleichberechtigung&quot; vertrÃĪgt das Land?" />
      <page pageid="149" ns="0" title="Femminismo" />
      <page pageid="172" ns="12" title="Aiuto:Templates" />
      <page pageid="360" ns="8" title="MediaWiki:Sharedupload-desc-here" />
      <page pageid="365" ns="0" title="Fiat Lux" />
      <page pageid="385" ns="10" title="Template:Disambigua" />
      <page pageid="424" ns="0" title="Marco Biagini" />
    </pages>
  </query>
</api>