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="Busy_ref.png" />
  </query-continue>
  <query>
    <allimages>
      <img name="BCAL_LED_Pulser.png" timestamp="2020-01-16T23:30:22Z" url="https://halldweb.jlab.org/hdops/wiki/images/3/3f/BCAL_LED_Pulser.png" descriptionurl="https://halldweb.jlab.org/hdops/wiki/index.php/File:BCAL_LED_Pulser.png" ns="6" title="File:BCAL LED Pulser.png" />
      <img name="BCAL_environmental_sensors.png" timestamp="2014-06-04T11:33:21Z" url="https://halldweb.jlab.org/hdops/wiki/images/a/ae/BCAL_environmental_sensors.png" descriptionurl="https://halldweb.jlab.org/hdops/wiki/index.php/File:BCAL_environmental_sensors.png" ns="6" title="File:BCAL environmental sensors.png" />
      <img name="BCAL_voltages.png" timestamp="2014-05-22T21:13:35Z" url="https://halldweb.jlab.org/hdops/wiki/images/d/d9/BCAL_voltages.png" descriptionurl="https://halldweb.jlab.org/hdops/wiki/index.php/File:BCAL_voltages.png" ns="6" title="File:BCAL voltages.png" />
      <img name="Base_lockup_RootSpy.png" timestamp="2021-11-11T03:37:46Z" url="https://halldweb.jlab.org/hdops/wiki/images/2/2b/Base_lockup_RootSpy.png" descriptionurl="https://halldweb.jlab.org/hdops/wiki/index.php/File:Base_lockup_RootSpy.png" ns="6" title="File:Base lockup RootSpy.png" />
      <img name="Base_lockup_V.png" timestamp="2021-11-11T02:38:30Z" url="https://halldweb.jlab.org/hdops/wiki/images/c/c3/Base_lockup_V.png" descriptionurl="https://halldweb.jlab.org/hdops/wiki/index.php/File:Base_lockup_V.png" ns="6" title="File:Base lockup V.png" />
      <img name="Base_lockup_channel.png" timestamp="2021-11-11T02:38:57Z" url="https://halldweb.jlab.org/hdops/wiki/images/3/3b/Base_lockup_channel.png" descriptionurl="https://halldweb.jlab.org/hdops/wiki/index.php/File:Base_lockup_channel.png" ns="6" title="File:Base lockup channel.png" />
      <img name="Base_lockup_scalers.png" timestamp="2021-11-11T02:38:42Z" url="https://halldweb.jlab.org/hdops/wiki/images/e/e4/Base_lockup_scalers.png" descriptionurl="https://halldweb.jlab.org/hdops/wiki/index.php/File:Base_lockup_scalers.png" ns="6" title="File:Base lockup scalers.png" />
      <img name="Bcal_css.png" timestamp="2017-02-23T03:19:37Z" url="https://halldweb.jlab.org/hdops/wiki/images/1/15/Bcal_css.png" descriptionurl="https://halldweb.jlab.org/hdops/wiki/index.php/File:Bcal_css.png" ns="6" title="File:Bcal css.png" />
      <img name="Beam_Energy.png" timestamp="2015-05-18T21:47:16Z" url="https://halldweb.jlab.org/hdops/wiki/images/1/12/Beam_Energy.png" descriptionurl="https://halldweb.jlab.org/hdops/wiki/index.php/File:Beam_Energy.png" ns="6" title="File:Beam Energy.png" />
      <img name="Beam_line_jack.jpg" timestamp="2014-10-13T14:17:06Z" url="https://halldweb.jlab.org/hdops/wiki/images/4/48/Beam_line_jack.jpg" descriptionurl="https://halldweb.jlab.org/hdops/wiki/index.php/File:Beam_line_jack.jpg" ns="6" title="File:Beam line jack.jpg" />
    </allimages>
  </query>
</api>