When creating a base view from a JSON data source via an HTTP Client request, the HTTP body in the response is mandatory for the Virtual DataPort server to create the schema of the base view. As of now, the functionality to retrieve the header values as part of the output result is not supported. An alternative approach to solving your scenario is by [developing a custom wrapper](https://community.denodo.com/docs/html/browse/8.0/en/vdp/developer/developing_extensions/developing_custom_wrappers/developing_custom_wrappers#developing-custom-wrappers) in Java to capture the response of HTTP headers and import it into the Virtual DataPort server.
You can also refer to the answer in a similar question here: [Retrieve header from http client request](https://community.denodo.com/answers/question/details?questionId=9064u000000L8GjAAK&title=Retieve+header+from+http+client+request).
Hope this helps!