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>
    <allimages aicontinue="Compatibility_Diagnostics_Menu_Item2.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="Character.png" timestamp="2010-03-08T20:45:10Z" url="https://isboxer.com/w/images/d/d8/Character.png" descriptionurl="https://isboxer.com/wiki/File:Character.png" ns="6" title="File:Character.png" />
      <img name="Character_set.png" timestamp="2010-06-08T13:52:10Z" url="https://isboxer.com/w/images/1/10/Character_set.png" descriptionurl="https://isboxer.com/wiki/File:Character_set.png" ns="6" title="File:Character set.png" />
      <img name="Character_set_-_key_maps.png" timestamp="2010-03-08T20:34:03Z" url="https://isboxer.com/w/images/c/c4/Character_set_-_key_maps.png" descriptionurl="https://isboxer.com/wiki/File:Character_set_-_key_maps.png" ns="6" title="File:Character set - key maps.png" />
      <img name="Character_set_-_slot.png" timestamp="2010-03-08T20:41:07Z" url="https://isboxer.com/w/images/7/79/Character_set_-_slot.png" descriptionurl="https://isboxer.com/wiki/File:Character_set_-_slot.png" ns="6" title="File:Character set - slot.png" />
      <img name="Click_Bar_Buttons_page.png" timestamp="2010-06-08T13:47:22Z" url="https://isboxer.com/w/images/5/50/Click_Bar_Buttons_page.png" descriptionurl="https://isboxer.com/wiki/File:Click_Bar_Buttons_page.png" ns="6" title="File:Click Bar Buttons page.png" />
      <img name="Click_bar_button_action.png" timestamp="2011-07-31T13:07:54Z" url="https://isboxer.com/w/images/6/6a/Click_bar_button_action.png" descriptionurl="https://isboxer.com/wiki/File:Click_bar_button_action.png" ns="6" title="File:Click bar button action.png" />
      <img name="Click_bar_state_action.png" timestamp="2011-04-17T11:43:22Z" url="https://isboxer.com/w/images/6/6f/Click_bar_state_action.png" descriptionurl="https://isboxer.com/wiki/File:Click_bar_state_action.png" ns="6" title="File:Click bar state action.png" />
      <img name="Clickbars.jpg" timestamp="2011-12-28T23:11:56Z" url="https://isboxer.com/w/images/5/5e/Clickbars.jpg" descriptionurl="https://isboxer.com/wiki/File:Clickbars.jpg" ns="6" title="File:Clickbars.jpg" />
      <img name="Combat_Hotkeys_Key_Map.png" timestamp="2012-05-10T23:52:27Z" url="https://isboxer.com/w/images/a/af/Combat_Hotkeys_Key_Map.png" descriptionurl="https://isboxer.com/wiki/File:Combat_Hotkeys_Key_Map.png" ns="6" title="File:Combat Hotkeys Key Map.png" />
      <img name="Compatibility_Diagnostics_Menu_Item.png" timestamp="2018-10-25T01:43:12Z" url="https://isboxer.com/w/images/0/03/Compatibility_Diagnostics_Menu_Item.png" descriptionurl="https://isboxer.com/wiki/File:Compatibility_Diagnostics_Menu_Item.png" ns="6" title="File:Compatibility Diagnostics Menu Item.png" />
    </allimages>
  </query>
</api>