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>
    <allpages gapcontinue="Safe_Cheats_for_Call_Of_Duty_Mobile_Android_And_Ios" />
  </query-continue>
  <query>
    <pages>
      <page pageid="3241" ns="0" title="Real Sociedad Bascongada de Amigos del País">
        <revisions>
          <rev contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">__NOTOC__ __NOEDITSECTION__
&lt;!--header--&gt;
{{HeaderRSBAP}}

&lt;!--left column--&gt;
&lt;div style=&quot;float:left; width:55%&quot;&gt;&lt;div style=&quot;border:1px solid #5090C0; padding-bottom:1em&quot;&gt;
&lt;h2 style=&quot;background-color:#5090C0; font-weight:bold; color:white; padding:0.3em 1em; margin:0em 0; font-size:inherit; text-align:center&quot;&gt;DOCUMENTOS&lt;/h2&gt;

&lt;div id=&quot;mf-new-texts&quot; title=&quot;New texts&quot; style=&quot;margin:0 1em&quot;&gt;{{documentosRSBAP}}&lt;/div&gt;

&lt;/div&gt;&lt;/div&gt;

&lt;!--right column--&gt;
&lt;div style=&quot;float:right; width:45%&quot;&gt;&lt;div style=&quot;border:1px solid #5090C0; padding-bottom:1em; margin-left:1em&quot;&gt;
&lt;h2 style=&quot;background-color:#5090C0; font-weight:bold; color:white; padding:0.3em 1em; margin:0em 0; font-size:inherit; text-align:center&quot;&gt;PARTICIPANTES&lt;/h2&gt;

&lt;div style=&quot;margin:0 1em&quot;&gt;{{ColaboradoresRSBAP}}&lt;/div&gt;
&lt;h2 style=&quot;background-color:#5090C0; font-weight:bold; color:white; padding:0.3em 1em; margin:1em 0; font-size:inherit; text-align:center&quot;&gt;TEXTOS&lt;/h2&gt;

&lt;div style=&quot;margin:0 1em&quot;&gt;{{textosRSBAP}}&lt;/div&gt;

&lt;/div&gt;&lt;/div&gt;&lt;div style=&quot;clear:both&quot;&gt;&lt;/div&gt;</rev>
        </revisions>
      </page>
      <page pageid="1437" ns="0" title="Resurgimiento de las obras de Arriaga (1917)">
        <revisions>
          <rev contentformat="text/x-wiki" contentmodel="wikitext" xml:space="preserve">&lt;pages index=&quot;Resurgimiento_Arriaga.djvu&quot; from=2 to=47/&gt;</rev>
        </revisions>
      </page>
    </pages>
  </query>
</api>