I don't think that's as easy as one webservice call. At least I haven't seen this sort of functionality within LiveCycle.
What you could do is build your own webservice; first list all the contents from ContentServices:
and then Inspect those PDF documents:
hope it helps.
Thank you Diego, I had done it.
I was thinking it was an easier way to do this.
Tu fala Português?
Falo sim. haha