Can Google App Engine make a http request to a Compute Engine instance within the same project without an external IP?

Question

In App Engine I\'d like to make http fetch calls to a web server running on an Compute Engine instance, created within the same Google cloud project, and I\'m wondering if I

Answer 1

This is currently unsupported. Communication between App Engine and GCE must go through the URLFetch API and use a public IP.