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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.
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<?xml version="1.0"?>
<api>
  <query-continue>
    <backlinks blcontinue="0|Main_Page|15930" />
  </query-continue>
  <query>
    <backlinks>
      <bl pageid="8221" ns="3" title="User talk:Order" />
      <bl pageid="9148" ns="3" title="User talk:Cranky Joe" />
      <bl pageid="9317" ns="1" title="Talk:Evil" />
      <bl pageid="9444" ns="1" title="Talk:Theory of evolution/Archive 2" />
      <bl pageid="9741" ns="1" title="Talk:African Americans" />
      <bl pageid="10801" ns="1" title="Talk:Main Page/archive2" />
      <bl pageid="11468" ns="1" title="Talk:Scotland" />
      <bl pageid="13620" ns="3" title="User talk:Senatorkerry" />
      <bl pageid="15339" ns="1" title="Talk:Examples of Bias in Wikipedia/Archive4" />
      <bl pageid="15384" ns="3" title="User talk:SharonS/Archive1" />
    </backlinks>
  </query>
</api>