This repo has been archived and the documentation is no longer maintained. Sync and Tokenserver docs and code are in the syncstorage-rs GitHub repo. You can find the repo for this service here and the maintained documentation here.
This section is intended to provide a comprehensive guide to how Firefox Sync clients interact with the server and ultimately with each other to provide the functionality of syncing browser data between clients.
It is a somewhat technical document, but should require no in-depth knowledge. Links to more detailed API docs offer an opportunity to dig deeper.