How to debug HTTP Requests in Zendesk ZIS ?

Hi community,

I have to consume an external request from Zendesk ZIS for get an access token and use it in subsequent other requests, that endpoint is of type application/x-www-form-urlencoded.

When I consume that request it gets 500 http error code, ZIS only offer a general Cause of the error that is basically the http error code and no much more.

I would like to see the response headers of the request.

Do you know any way for debug in deep all request response made from ZIS ?