The Modules API provides functions that return information about the currentoperating environment (module, version, and instance).

The Modules API also has functions that retrieve the address of a module, aversion, or an instance. This allows an application to send requests from oneinstance to another, in both the development and production environments.

The instance ID of an automatic scaled module will be returned as a uniquebase64 encoded value, e.g.e4b565394caa.

You can communicate between modules in the same app by fetching the hostname ofthe target module:

You can also use theURL Fetch service.