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="Block_of_Blue_Hexorium_Crystal.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="Basic_Conversion_Computer.png" timestamp="2020-06-21T13:40:54Z" url="https://wiki.celestek.xyz/images/9/9e/Basic_Conversion_Computer.png" descriptionurl="https://wiki.celestek.xyz/index.php?title=File:Basic_Conversion_Computer.png" ns="6" title="File:Basic Conversion Computer.png" />
      <img name="Bg.jpg" timestamp="2015-11-29T21:35:52Z" url="https://wiki.celestek.xyz/images/9/98/Bg.jpg" descriptionurl="https://wiki.celestek.xyz/index.php?title=File:Bg.jpg" ns="6" title="File:Bg.jpg" />
      <img name="Black_Hexorium_Crystal.png" timestamp="2015-04-21T14:57:43Z" url="https://wiki.celestek.xyz/images/0/0e/Black_Hexorium_Crystal.png" descriptionurl="https://wiki.celestek.xyz/index.php?title=File:Black_Hexorium_Crystal.png" ns="6" title="File:Black Hexorium Crystal.png" />
      <img name="Black_Hexorium_Dye.png" timestamp="2020-06-09T17:40:20Z" url="https://wiki.celestek.xyz/images/e/ec/Black_Hexorium_Dye.png" descriptionurl="https://wiki.celestek.xyz/index.php?title=File:Black_Hexorium_Dye.png" ns="6" title="File:Black Hexorium Dye.png" />
      <img name="Black_Hexorium_Monolith.png" timestamp="2015-05-21T12:12:38Z" url="https://wiki.celestek.xyz/images/4/42/Black_Hexorium_Monolith.png" descriptionurl="https://wiki.celestek.xyz/index.php?title=File:Black_Hexorium_Monolith.png" ns="6" title="File:Black Hexorium Monolith.png" />
      <img name="Black_Hexorium_Nether_Monolith.png" timestamp="2015-05-21T12:12:39Z" url="https://wiki.celestek.xyz/images/8/8c/Black_Hexorium_Nether_Monolith.png" descriptionurl="https://wiki.celestek.xyz/index.php?title=File:Black_Hexorium_Nether_Monolith.png" ns="6" title="File:Black Hexorium Nether Monolith.png" />
      <img name="Black_Hexorium_Nether_Ore.png" timestamp="2015-05-21T12:12:38Z" url="https://wiki.celestek.xyz/images/6/65/Black_Hexorium_Nether_Ore.png" descriptionurl="https://wiki.celestek.xyz/index.php?title=File:Black_Hexorium_Nether_Ore.png" ns="6" title="File:Black Hexorium Nether Ore.png" />
      <img name="Black_Hexorium_Ore.png" timestamp="2015-05-21T12:12:37Z" url="https://wiki.celestek.xyz/images/f/f6/Black_Hexorium_Ore.png" descriptionurl="https://wiki.celestek.xyz/index.php?title=File:Black_Hexorium_Ore.png" ns="6" title="File:Black Hexorium Ore.png" />
      <img name="Black_Hexorium_Wafer.png" timestamp="2015-05-14T20:58:31Z" url="https://wiki.celestek.xyz/images/b/bb/Black_Hexorium_Wafer.png" descriptionurl="https://wiki.celestek.xyz/index.php?title=File:Black_Hexorium_Wafer.png" ns="6" title="File:Black Hexorium Wafer.png" />
      <img name="Block_of_Black_Hexorium_Crystal.png" timestamp="2015-05-18T21:12:36Z" url="https://wiki.celestek.xyz/images/d/d0/Block_of_Black_Hexorium_Crystal.png" descriptionurl="https://wiki.celestek.xyz/index.php?title=File:Block_of_Black_Hexorium_Crystal.png" ns="6" title="File:Block of Black Hexorium Crystal.png" />
    </allimages>
  </query>
</api>