Conductor supports JSON Path for simple node values. However, with lists and more complex JSON documents, we've created a new System Task using Jolt.
The task is implemented with Spring Dependency Injection.
In the future, we may want to break this out into its own Guice plugin and not rely on Spring or the Scheduling plugin.
Online testers for transformations
The JSON Path tester can be used to develop usages in Conductor.
A Jolt tester can help with developing the Jolt Spec for the more complicated cases that require Jolt.