Bramble Mailbox on a Mac
Store-and-forward sync server for Bramble devices that are never online together · Secrets & Vaults
The Bramble mailbox (AGPL-3.0) holds sealed vault changes and files until every device in a group has collected them, then deletes them; so a laptop and a phone that are never on at the same time still sync. It reads nothing it stores, and every request is signed by a device in the group. It runs on Node 24 from the Bramble repo (pnpm install, then pnpm --filter bramble-mailbox-server start), listening on 7401 with data in DATA_DIR (mailbox.db + bodies/). Set MAILBOX_TOKEN (16+ URL-safe characters) to make it private, RETENTION_MAX_DAYS (default 365) and optionally QUOTA_BYTES. GET /health answers ok, which is what this pane checks. Put it behind a TLS reverse proxy and give the app https://your-host; the token goes in Bramble's mailbox settings, never in the URL. There is no published image, so it isn't one-click here.
Run Bramble Mailbox with FrontierStack
Install or connect Bramble Mailbox; then check its status, ports and certificate from FrontierStack. The same screen links to firewall checks and backups where they apply.
Run it from your Mac.
FrontierStack installs, monitors and secures services on this Mac and on linked servers; and keeps your passwords and keys out of any AI's sight.
Download FrontierStackApple notarized · Safe & secure · macOS 13 Ventura+