# Alerts on Chain

> Real-time blockchain notifications: wallet movements and smart contracts (method calls and events), with conditions, delivered to Telegram in seconds (Discord, Slack, email, webhooks coming). Ethereum mainnet today. The free Beta plan needs no credit card.

Alerts on Chain never requests or stores private keys; monitoring only reads public addresses. Each alert says what happened in plain words (one line per matched transfer, call or event), names the watched wallet or contract and the rule, and links to the transaction on Etherscan. An event is one transaction seen on one watched address. It counts once, whether it matches none, one or several of your rules and however many channels it fans out to. An alert is sent only when a rule matches.

## What it does today (Core)
- Wallet movements: Alerts on ETH, ERC-20 and NFT transfers in or out of any address, filtered by direction, type, asset and counterparty.
- Amount thresholds: Minimum and maximum amounts in the asset's own units (no USD), for one asset or ETH.
- Token transfers: Every Transfer of an ERC-20 token, optionally only above an amount or to/from chosen addresses.
- Token approvals: Approvals granted on a token, with unlimited allowances flagged as a drain risk.
- NFT mints, burns, transfers and sales: Mints, burns and transfers on an ERC-721 or ERC-1155 collection, and Seaport sales (without the sale price).
- DEX swaps: Swaps on a Uniswap V2/V3-style pool, with conditions on raw token amounts.
- Lending activity: Borrows and liquidations on an Aave-style money market.
- DAO governance: New proposals and votes on a Governor-style DAO.
- Method calls: Direct calls to a contract's functions: any method, or one you name by pasting its signature, with conditions on arguments by name, caller, ETH value and status.
- Contract events: Specific events from the standard catalog, the events listed for a well-known contract, or a pasted event signature, with conditions on any argument by name.
- Telegram delivery: Alerts in a Telegram DM or group within seconds, one message per transaction per rule, named after the rule.
- Everything on a contract: Every log a contract emits, with no event to pick. Each match counts toward the plan's monthly events, like any other alert.

## Coming with Premium (not available yet)
- USD values and thresholds: USD amounts in alerts and USD-based thresholds.
- Token and NFT metadata: Prices, floor prices, rarity, NFT sale prices and address labels.
- Calls made by other contracts: Method calls routed through Safes, routers, multicall or smart accounts.
- Approval risk across all tokens: Every approval a wallet grants, on any token.
- Failed transactions and gas: Failed-transaction and gas alerts for wallets.
- Unknown-contract interactions: Alerts when a wallet interacts with a new or unverified contract.
- Abnormal spending: Alerts on spending that breaks a wallet's usual pattern.
- Chain-wide movements: Large movements and new launches across the whole chain, not one address.
- More networks: Networks beyond Ethereum mainnet.
- More channels: Discord, Slack, email and outgoing webhooks.

## Key pages
- [Home](https://alertsonchain.com/): Product overview, how it works, pricing, and FAQ.
- [Alerts](https://alertsonchain.com/alerts): Alert types by category, each with one-click templates.
- [Guides](https://alertsonchain.com/guides): Step-by-step setup guides for NFT, wallet and smart contract alerts.
- [FAQ](https://alertsonchain.com/faq): Networks, channels, wallet and contract rules, pricing, and security.
- [Roadmap](https://alertsonchain.com/roadmap): What works today, what is being built next and what is being explored.

## Alert types
- [NFT alerts](https://alertsonchain.com/alerts/nft): Real-time NFT alerts: new mints, collection transfers, OpenSea (Seaport) sales and NFTs in or out of any wallet. ERC-721 and ERC-1155.
  - [NFT Mint Alerts](https://alertsonchain.com/alerts/nft/mint-alerts): Get a Telegram alert the moment a token is minted on any ERC-721 or ERC-1155 collection.
  - [NFT Collection Tracker](https://alertsonchain.com/alerts/nft/collection-tracker): Track every mint, transfer and burn on an NFT collection and get a Telegram alert as tokens change hands.
  - [NFT Sales Alerts](https://alertsonchain.com/alerts/nft/sales-alerts): Get a Telegram alert when an order is fulfilled on Seaport, the contract behind OpenSea sales. Sale prices are coming soon.
  - [NFT Burn Alerts](https://alertsonchain.com/alerts/nft/burn-alerts): Get a Telegram alert when tokens of a collection are burned: sent to the zero address or a dead address.
- [Wallet alerts](https://alertsonchain.com/alerts/wallet): Track any Ethereum address and get an alert when ETH, ERC-20 tokens or NFTs move in or out, filtered by direction, asset, amount and counterparty.
  - [Treasury Wallet Alerts](https://alertsonchain.com/alerts/wallet/treasury-alerts): Watch a DAO or company treasury wallet and get a Telegram alert on outgoing transfers, above an amount or to counterparties outside a list.
  - [Wallet Withdrawal Alerts](https://alertsonchain.com/alerts/wallet/withdrawal-alerts): Get a Telegram alert the moment ETH, tokens or NFTs leave a wallet you watch: your own, a treasury, a fund or a whale, with an optional minimum per asset.
- [Token alerts](https://alertsonchain.com/alerts/token): Get an alert on every transfer of an ERC-20 token, above an amount or between chosen addresses, plus approval alerts that flag unlimited allowances.
  - [Whale Alerts: Large Token Transfers](https://alertsonchain.com/alerts/token/large-transfer-alerts): Get a Telegram alert when a large amount of an ERC-20 token moves, with a minimum in the token's own units and optional from / to conditions.
  - [Token Approval Alerts](https://alertsonchain.com/alerts/token/approval-alerts): Get a Telegram alert for every approval granted on a token, with unlimited allowances flagged as a drain risk.
- [DeFi alerts](https://alertsonchain.com/alerts/defi): Real-time alerts for swaps on a Uniswap V2/V3-style pool, borrows and liquidations on an Aave-style market, and new proposals and votes on a Governor DAO.
  - [DEX Swap Alerts](https://alertsonchain.com/alerts/defi/swap-alerts): Get a Telegram alert for swaps on a Uniswap V2 or V3-style pool: every trade, only large ones, or only those sent by wallets you follow.
  - [Liquidity Pool Alerts](https://alertsonchain.com/alerts/defi/liquidity-alerts): Get a Telegram alert when liquidity is added to or removed from a pool, from its Mint and Burn events.
  - [Liquidation Alerts](https://alertsonchain.com/alerts/defi/liquidation-alerts): Get a Telegram alert for liquidations on a lending market: Aave V3, Spark, Compound V3 or Morpho Blue.
  - [DAO Governance Alerts](https://alertsonchain.com/alerts/defi/governance-alerts): Track DAO governance in real time: a Telegram alert on new proposals and votes for any Governor or Compound-style contract.
- [Smart contract alerts](https://alertsonchain.com/alerts/smart-contract): Watch any Ethereum contract: get an alert when a method is called or an event fires, with conditions on arguments, caller and ETH value.
  - [Smart Contract Event Alerts](https://alertsonchain.com/alerts/smart-contract/event-alerts): Get a Telegram alert when a contract emits an event (token transfers, swaps, governance actions), with conditions on any argument by name.
  - [Smart Contract Function Call Alerts](https://alertsonchain.com/alerts/smart-contract/method-call-alerts): Get a Telegram alert when a function is called on a contract, with conditions on its arguments by name, the caller, the ETH value and the status.
  - [Safe Multisig Alerts](https://alertsonchain.com/alerts/smart-contract/multisig-alerts): Get a Telegram alert when a Safe or other multisig executes a transaction, with conditions on the signer who called it.

## Guides
- [How to get NFT mint alerts](https://alertsonchain.com/guides/nft-mint-alerts-telegram): How 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.
- [How to track NFT sales](https://alertsonchain.com/guides/track-nft-sales-telegram): How 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.
- [NFT wallet tracker: how to follow any wallet's NFTs](https://alertsonchain.com/guides/track-nft-wallet): Use 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.
- [How to set up Ethereum wallet alerts](https://alertsonchain.com/guides/ethereum-wallet-alerts-telegram): How to set up Ethereum wallet alerts: watch any address and get an alert when ETH, tokens or NFTs move in or out. Pick a template, cut the noise, free.
- [How to monitor smart contract events](https://alertsonchain.com/guides/smart-contract-event-alerts): How 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.
- [Which on-chain events are worth an alert (and which are noise)](https://alertsonchain.com/guides/on-chain-events-worth-an-alert): 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.
- [What are blockchain alerts?](https://alertsonchain.com/guides/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.
- [How to replace OpenZeppelin Defender Monitor alerts](https://alertsonchain.com/guides/openzeppelin-defender-monitor-alternative): OpenZeppelin 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.
- [How to get notified when a contract changes owner or is paused](https://alertsonchain.com/guides/contract-admin-alerts): Get 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.

## Live feeds
- [Trackers](https://alertsonchain.com/track): Free live feeds from Ethereum: every USDT and USDC mint, burn and freeze, and every transfer out of the Ethereum Foundation's wallets, within seconds.
  - [USDT and USDC mints](https://alertsonchain.com/track/stablecoin-mints): Every new USDT and USDC on Ethereum within seconds of confirmation: Tether and Circle mints with the amount and the transaction. A free live feed.
  - [USDT and USDC burns](https://alertsonchain.com/track/stablecoin-burns): Every USDT and USDC burned on Ethereum within seconds of confirmation: Tether redemptions and Circle burns, with the amount and the transaction. Free.
  - [USDT and USDC blacklist](https://alertsonchain.com/track/stablecoin-blacklist): Every address Tether or Circle blacklists on Ethereum, live: freezes, unfreezes and destroyed USDT. Plus how to check if an address is frozen.
  - [Ethereum Foundation wallet](https://alertsonchain.com/track/ethereum-foundation): Every ETH and token the Ethereum Foundation sends from its treasury and DeFi wallets, within seconds of confirmation. A free live feed, plus the EF addresses.

## Pricing
- Beta: free, no credit card. 1 wallet, 1 contract, 100 events a month.
- Paid tiers from $5 to $349 a month (Personal $5, Starter $9, Basic $19, Plus $29, Growth $49, Scale $99, Pro $199, Business $349): up to 100 wallets and 50 contracts; tiers differ only in monthly events (5,000 to 2,000,000).
- A wallet alert uses 1 event; a contract alert uses 1.

## Legal
- [Privacy Policy](https://alertsonchain.com/privacy-policy)
- [Terms of Service](https://alertsonchain.com/terms-of-service)