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>
    <pageswithprop gpwpcontinue="336" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1" ns="0" title="Página principal" contentmodel="wikitext" pagelanguage="pt-br" touched="2020-02-03T14:04:20Z" lastrevid="2395" counter="107955" length="5470" />
      <page pageid="18" ns="0" title="Objetivo" contentmodel="wikitext" pagelanguage="pt-br" touched="2015-04-27T17:59:49Z" lastrevid="2125" counter="2911" length="1528" />
      <page pageid="69" ns="10" title="Predefinição:Destaque-mudancas" contentmodel="wikitext" pagelanguage="pt-br" touched="2019-10-09T14:06:13Z" lastrevid="2509" counter="30155" length="5572" />
      <page pageid="72" ns="0" title="Veículos Placa Preta" contentmodel="wikitext" pagelanguage="pt-br" touched="2011-07-07T13:22:48Z" lastrevid="1261" counter="6006" length="3427" />
      <page pageid="76" ns="0" title="História Sempre Viva" contentmodel="wikitext" pagelanguage="pt-br" touched="2017-06-01T20:51:14Z" lastrevid="2381" counter="3051" length="3149" />
      <page pageid="105" ns="0" title="Artigos" contentmodel="wikitext" pagelanguage="pt-br" touched="2011-07-07T13:21:03Z" lastrevid="1260" counter="3131" length="3429" />
      <page pageid="268" ns="0" title="Entenda (como ninguém) a Lei da Placa Preta" contentmodel="wikitext" pagelanguage="pt-br" touched="2012-06-11T14:18:19Z" lastrevid="1589" counter="9619" length="15389" />
      <page pageid="273" ns="0" title="Ver Mais Destaques" contentmodel="wikitext" pagelanguage="pt-br" touched="2018-05-03T18:11:15Z" lastrevid="2447" counter="3990" length="20571" />
      <page pageid="321" ns="0" title="Inscrição para o XXIV Encontro de Veículos Antigos do Centro-Oeste" contentmodel="wikitext" pagelanguage="pt-br" lastrevid="1761" counter="7046" length="4126" />
      <page pageid="335" ns="0" title="Inscrição com Passaporte para o Hot Park" contentmodel="wikitext" pagelanguage="pt-br" touched="2012-07-26T13:21:38Z" lastrevid="1751" counter="1649" length="4670" />
    </pages>
  </query>
</api>