We don't currently have any customers using Kable and GraphQL together. To be totally honest, I'm not a GraphQL expert, and I don't want to give you any false information, so unfortunately no, I don't have an example for you.

Kable can be accessed through our Node and Python libraries (more languages on the way) or over HTTPS REST API. I will have to defer to your design sense about the best way to leverage these technologies with a GraphQL API today.