Guides
How to set up blockchain alerts
Practical, step-by-step guides for NFT mints and sales, NFT and Ethereum wallets, and smart contract events. Each one shows the alert you'll get, how to set it up with a one-click template, and what the alerts don't do yet.
Ethereum mainnet · Telegram · free Beta plan, no card
NFT alerts
Mints, sales and the wallets that collect them.
- How to get NFT mint alertsHow to get an alert every time an Ethereum NFT collection mints: find the contract, pick the template, read the alert. A few minutes, free, no code.5 min read
- How to track NFT salesHow to track NFT sales, like an OpenSea sales bot: watch Seaport or a collection's transfers, see what each alert shows, keep the event count down.6 min read
- NFT wallet tracker: how to follow any wallet's NFTsUse Alerts on Chain as an NFT wallet tracker: get an alert when any Ethereum address receives, sends or mints an NFT. One template, narrowed by conditions.5 min read
Wallet alerts
ETH, tokens and NFTs moving in and out of any address.
Smart contract alerts
Events and method calls on any Ethereum contract.
- How to monitor smart contract eventsHow to monitor smart contract events on Ethereum: pick events from a catalog or paste a signature, filter on arguments by name, get each match within seconds. No code.6 min read
- How to replace OpenZeppelin Defender Monitor alertsOpenZeppelin set Defender's shutdown for July 1, 2026. How Defender Monitor alerts map onto contract rules with argument conditions, and what doesn't carry over.7 min read
- How to get notified when a contract changes owner or is pausedGet notified when a contract's ownership is transferred, it is paused or upgraded, or a role changes: one event rule each, Admin method called, and the limits.6 min read
The basics
What blockchain alerts are and how they work.
- Which on-chain events are worth an alert (and which are noise)The on-chain events worth an alert, from incoming tokens and unlimited approvals to NFT mints and admin changes, and the ones that are only noise.8 min read
- What are blockchain alerts?Blockchain alerts turn activity on a wallet or smart contract into real-time messages. How they work, what you can watch on Ethereum, and how to set one up.5 min read
Set up your first alert in two minutes
Free while in beta. No card, no code, no private keys.