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>
<alltransclusions gatcontinue="Controller/Mdsal/REST" />
</query-continue>
<query>
<pages>
<page ns="10" title="Template:Category handler" missing="" />
<page ns="10" title="Template:Cmbox" missing="" />
<page pageid="3323" ns="10" title="Template:Beryllium Release" />
<page pageid="847" ns="10" title="Template:Bgpcep/JavaDoc" />
<page pageid="848" ns="10" title="Template:Bgpcep/REST" />
<page pageid="4087" ns="10" title="Template:Boron Release" />
<page pageid="2272" ns="10" title="Template:Bugzilla/link" />
<page pageid="4949" ns="10" title="Template:Carbon Release" />
<page pageid="1120" ns="10" title="Template:Clear" />
<page pageid="950" ns="10" title="Template:Controller/Config/REST" />
</pages>
</query>
</api>