New Charges - Find By Key


When I submit a charge via the XML API I get the following back once the submission is accepted.This value is embedded in a XML field called DocRequestKey

I now need to find that charge via the above DocRequestKey value so I can update our records with the charge code. I think I can do that via the ChargeSearch resource on the XML API(link below), looks like DocRequestKey maps to the ContinuationKey field.

My question is:

Is there any way I can use the public API to find the new charge using that key above or anything else? It doesn’t seem to map to anything in the public JSON API as far as I can tell.

Any advice is appreciated.