Please note that Aggregate is no longer being supported. Central is now the ODK server. We recommend you upgrade if possible to ensure proper functioning and security. The documentation provides instructions for different ways to set up Central. Also, Get ODK provides reliable paid cloud hosting.
The post below has for more details about the end-of-life for Aggregate.
However, someone on the forum may still be able to help you.
What version of Aggregate are you using?
Are you hosting your Aggregate on Google App Engine? Do you have a paid account or only the free level?
Are you providing a token or credentials in your API call?
Your URL query includes an empty cursor parameter?
the headers is at present on Content-Type is text/xml , and its giving 400 error making a get call made in axios , i am trying to programmatically extract the data in aggregate , and the use the submission rest api to make the data go in central, that my aim.
is there a rest end points how to see the complete list of projects aggregate has, and the in then in each project what all are the available forms in them , and download the corresponding form definitions , from aggregate.