Data Service REST Job tab displays the data transformation logic used to implement your service. The logic can use any of the CloverDX data transformation components as well as subgraphs.
It is not possible to access an HTTP request or service response from a subgraph, i.e. a subgraph cannot be used as a direct reader or writer in job logic. However, it can be used as a transforming component anywhere in the flow.
Similarly, if you use Jobflow components like ExecuteGraph or ExecuteJobflow to launch a separate graph, the HTTP context will not be passed to the spawned child job.