We help users watch any Bitcoin address and receive trustworthy, timely email alerts the moment blockchain activity happens.
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Near‑real‑time detection using mempool + block data from multiple nodes.
Human‑readable alerts with key amounts, txid, and confirmation status.
We only need the BTC addresses you choose to monitor and your email for alerts. No private keys.
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.
Monitor your Bitcoin addresses and never miss a transaction again. 21clock.com helps you track new transactions in real time and receive instant email notifications whenever activity occurs on your addresses. Whether you want to watch a single address or monitor multiple wallets at once – we have the right solution for you.
Get Started NowOur core features are available in every plan
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Create up to 21 active alerts
Unlimited notifications
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Create up to 121 active alerts
Unlimited notifications
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We’ve compiled answers to the most common questions about 21clock.com. If you can’t find what you’re looking for, feel free to contact us
21clock.com is a Bitcoin address monitoring platform. We allow you to track transactions in real time and receive email alerts whenever new activity occurs on your addresses.
Once you add your BTC address to your 21clock.com account, our system monitors it continuously. When a new transaction is detected, we immediately send an email alert with full transaction details.
Absolutely. We do not require access to your private keys. We only monitor public blockchain data related to your Bitcoin addresses. Your email and account details are protected using strong encryption.
We offer a free plan with limited address monitoring. For advanced tracking, additional features, and higher limits, you can upgrade to one of our premium plans.
Yes. Depending on your plan, you can monitor multiple BTC addresses and receive alerts for all of them.
