Weave consists of two APIs: [http://hg.mozilla.org/services/sync-server Weave Server (sync-server)] and [http://hg.mozilla.org/services/reg-server/summary Weave Registration Server (reg-server)]. Sync is used for synchronizing data with the Weave server, while Reg-Server is used for setting up and managing user accounts. Both utilize an Apache front-end and a MySQL Storage backend.