Pre/Post request scripts are also available in Kreya via the Scripting feature (only available in paid versions), which also allows to define tests. A CLI to run these tests and variables (https://github.com/riok/Kreya/issues/23) are currently on the roadmap.

GraphQL may be supported in the future, but we currently plan to expand the core features of Kreya first.

Regarding collaboration, we explicitely designed the Kreya storage model to be easily syncable via git (or your favorite VCS).