Bitcoin is open, but staying informed can be hard. Explorers are noisy, wallet alerts are inconsistent, and on‑chain activity moves fast. 21Clock was created to make reliable, privacy‑respecting Bitcoin address monitoring accessible to everyone—from hobbyists and traders to businesses tracking treasury addresses.

Real‑time monitoring for one or many BTC addresses.

Email notifications when new transactions confirm or first appear in the mempool (configurable).

Quick drill‑down to full transaction details: inputs, outputs, fees, confirmations.

Historical address activity timelines & running balances.

21Clock is built by a small distributed team of Bitcoin enthusiasts, developers, and infrastructure engineers. We operate globally with roots in the open‑source community.