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="20070125054000|Odamex-r103-winxp.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="CmakeGUI_Windows.jpg" timestamp="2019-01-17T15:19:48Z" user="Ch0wW" url="http://www.odamex.net/w/images/c/cd/CmakeGUI_Windows.jpg" descriptionurl="http://www.odamex.net/wiki/File:CmakeGUI_Windows.jpg" ns="6" title="File:CmakeGUI Windows.jpg" />
      <img name="CMake_Linux_Compiled.png" timestamp="2012-07-14T18:17:34Z" user="AlexMax" url="http://www.odamex.net/w/images/c/c3/CMake_Linux_Compiled.png" descriptionurl="http://www.odamex.net/wiki/File:CMake_Linux_Compiled.png" ns="6" title="File:CMake Linux Compiled.png" />
      <img name="CMake_Win_SDLMAIN.png" timestamp="2012-07-14T18:14:45Z" user="AlexMax" url="http://www.odamex.net/w/images/4/49/CMake_Win_SDLMAIN.png" descriptionurl="http://www.odamex.net/wiki/File:CMake_Win_SDLMAIN.png" ns="6" title="File:CMake Win SDLMAIN.png" />
      <img name="CMake_Win_ClientDir.png" timestamp="2012-07-14T18:13:01Z" user="AlexMax" url="http://www.odamex.net/w/images/3/32/CMake_Win_ClientDir.png" descriptionurl="http://www.odamex.net/wiki/File:CMake_Win_ClientDir.png" ns="6" title="File:CMake Win ClientDir.png" />
      <img name="CMake_Win_GUI.png" timestamp="2011-12-03T21:13:48Z" user="AlexMax" url="http://www.odamex.net/w/images/d/d8/CMake_Win_GUI.png" descriptionurl="http://www.odamex.net/wiki/File:CMake_Win_GUI.png" ns="6" title="File:CMake Win GUI.png" />
      <img name="Odamex-x11-fbsd61.png" timestamp="2008-04-17T02:21:04Z" user="Russell" url="http://www.odamex.net/w/images/2/2b/Odamex-x11-fbsd61.png" descriptionurl="http://www.odamex.net/wiki/File:Odamex-x11-fbsd61.png" ns="6" title="File:Odamex-x11-fbsd61.png" />
      <img name="Codeblocks_bin_directory_final.png" timestamp="2007-09-02T22:02:23Z" user="AlexMax" url="http://www.odamex.net/w/images/8/89/Codeblocks_bin_directory_final.png" descriptionurl="http://www.odamex.net/wiki/File:Codeblocks_bin_directory_final.png" ns="6" title="File:Codeblocks bin directory final.png" />
      <img name="Odamex-r166-osxppc.png" timestamp="2007-03-09T14:19:10Z" user="Voxel" url="http://www.odamex.net/w/images/7/74/Odamex-r166-osxppc.png" descriptionurl="http://www.odamex.net/wiki/File:Odamex-r166-osxppc.png" ns="6" title="File:Odamex-r166-osxppc.png" />
      <img name="Odamex-r166-linuxppc.png" timestamp="2007-03-08T20:35:48Z" user="AlexMax" url="http://www.odamex.net/w/images/0/01/Odamex-r166-linuxppc.png" descriptionurl="http://www.odamex.net/wiki/File:Odamex-r166-linuxppc.png" ns="6" title="File:Odamex-r166-linuxppc.png" />
      <img name="Odamex-r120-solaris.png" timestamp="2007-01-29T04:04:25Z" user="Excelblue" url="http://www.odamex.net/w/images/8/8c/Odamex-r120-solaris.png" descriptionurl="http://www.odamex.net/wiki/File:Odamex-r120-solaris.png" ns="6" title="File:Odamex-r120-solaris.png" />
    </allimages>
  </query>
</api>