> Would this be useful for adding document sharing to applications I write, for instance, a hypothetical word processor? I mean sharing with other people working on a document. The SDKs seem to be clients, so to interchange files between two applications with an embedded SDK, does it still need a third machine running an API server?

We could certainly incorporate an "embeddable" SDK so that zrok can be incorporated into other applications.

As it currently stands, you would need access to a zrok "service instance" ("cloud"), running the zrok controller (providing API access). But we could certainly look at other kinds of use cases where that control plane is potentially enabled ephemerally or on-demand. I have some ideas for things we might be able to do.

Neither of these are on the immediate roadmap. But if people ask for them, we could certainly build them.