Keys stay offline
Your seed never enters Coordinator. Signing happens only on SeedMask.
App
SeedMask Coordinator
A watch-only desktop companion for SeedMask. See balances, manage addresses and coins, and prepare signing payloads — without ever holding your keys.
Download
Get Coordinator v1.0.0
Watch-only desktop app for macOS, Windows, and Linux. Private keys never enter the Coordinator — signing stays on SeedMask.
Current build: macOS Apple Silicon (.dmg). Windows and Linux downloads will appear here when those packages are ready.
Interface
Watch-only by architecture
The Coordinator tracks public wallet state and helps you build unsigned transactions you will sign on SeedMask. Private keys never enter the application.
Review before you sign
Check amount and destination on desktop, then confirm again on the device screen.
Air-gapped end to end
Build an unsigned transaction on desktop, sign it on SeedMask, then bring the signed transaction back to broadcast — nothing spends without your on-device approval.
No hot wallet
Coordinator is watch-only by design. There is no hot wallet inside the app, so a compromised desktop cannot silently move funds.
Air-gapped signing story
Prepare a transaction on your computer. Move the unsigned payload to your SeedMask device. Confirm amounts and destinations on the device screen. Bring the signature back and broadcast when you are ready.
Built for Bitcoin & Kaspa
One clear desktop view for the chains SeedMask supports — balances, history, addresses, and coin (UTXO) lists aligned with how you actually custody funds. Light and dark themes ship with the app; the mock above shows Light mode.
Infrastructure
Run your own nodes
Point Coordinator at Bitcoin Core or kaspad. Verify and broadcast without a third-party API — while signing still stays on SeedMask.
Not affiliated with Bitcoin Core or kaspad.
Coming next
Mobile app
Android and iOS — watch-only. Keys stay on SeedMask.
Hardware + Coordinator
The full SeedMask loop: cold keys on device, watch-only control on desktop.