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>
    <recentchanges rccontinue="20231002061250|354670" />
  </query-continue>
  <query>
    <recentchanges>
      <rc type="edit" ns="10" title="Template:Documentation/GS4TOC" pageid="50066" revid="258403" old_revid="258326" rcid="354680" timestamp="2023-10-02T13:02:26Z" />
      <rc type="edit" ns="0" title="Documentation/AOO4 User Guides/Getting Started" pageid="50067" revid="258402" old_revid="258315" rcid="354679" timestamp="2023-10-02T13:00:38Z" />
      <rc type="edit" ns="0" title="Documentation/AOO4 User Guides/Getting Started/Setting Up and Customizing Apache OpenOffice/Choosing Language Settings" pageid="50713" revid="258401" old_revid="258400" rcid="354678" timestamp="2023-10-02T12:56:53Z" />
      <rc type="edit" ns="0" title="Documentation/AOO4 User Guides/Getting Started/Setting Up and Customizing Apache OpenOffice/Choosing Language Settings" pageid="50713" revid="258400" old_revid="258279" rcid="354677" timestamp="2023-10-02T12:56:02Z" />
      <rc type="edit" ns="0" title="Documentation/AOO4 User Guides/Getting Started/Setting Up and Customizing Apache OpenOffice/Choosing Options for All of Apache OpenOffice" pageid="50683" revid="258399" old_revid="258260" rcid="354676" timestamp="2023-10-02T12:52:32Z" />
      <rc type="edit" ns="0" title="Documentation/AOO4 User Guides/Getting Started/Graphics, the Gallery, and Fontwork/Adding Images to a Document" pageid="50650" revid="258398" old_revid="258397" rcid="354675" timestamp="2023-10-02T12:47:41Z" />
      <rc type="edit" ns="0" title="Documentation/AOO4 User Guides/Getting Started/Graphics, the Gallery, and Fontwork/Adding Images to a Document" pageid="50650" revid="258397" old_revid="258396" rcid="354674" timestamp="2023-10-02T12:46:27Z" />
      <rc type="edit" ns="0" title="Documentation/AOO4 User Guides/Getting Started/Graphics, the Gallery, and Fontwork/Adding Images to a Document" pageid="50650" revid="258396" old_revid="258395" rcid="354673" timestamp="2023-10-02T12:46:06Z" />
      <rc type="edit" ns="0" title="Documentation/AOO4 User Guides/Getting Started/Graphics, the Gallery, and Fontwork/Adding Images to a Document" pageid="50650" revid="258395" old_revid="258176" rcid="354672" timestamp="2023-10-02T12:44:15Z" />
      <rc type="edit" ns="0" title="Building old versions" pageid="46410" revid="258394" old_revid="258393" rcid="354671" timestamp="2023-10-02T06:13:31Z" />
    </recentchanges>
  </query>
</api>