Project type: Developer Tooling

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Sign in account](# Real-time alerts for on-chain events
### QuickAlerts enables you to leverage real-time blockchain data and advanced alerting to power your apps, make DeFi trading decisions based on the specific data that matters to you, add real-time blockchain event driven logic into your workflows, and more.
Create a QuickAlert docs](## Your real-time alert command center
QuickAlerts expressions can be simple or complex, enabling you to be notified of the real-time on-chain events that matter to you.
Receive real-time notifications for critical NFT events, including when they are minted, transferred, or added to collections.
Always be the first to know about changes to relevant tokens, price oracles, and liquidity pools.
Set up alerts for smart contract updates, including deployments, transfers, or custom-defined activities that matter to you.
Stay on top of transactions to and from specific wallet addresses. Track your digital assets and keep your wallet secure.
# Target anything with custom expressions
### QuickAlerts expressions can be simple or complex, depending on what is important to you, enabling you to be notified of real-time events that matter to you.
Wallet A (0x...aeC9B) just made a transfer
to Wallet B (0x...aeC9B) on Polygon mainnet
// A transaction is sent to, or received by a wallet
(tx_from == '0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B') ||
(tx_to == ' 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B')
A transaction (0x...aeC9B) just failed to complete
on a wallet (0x...aeC9B) you're monitoring
// Get an instant alert whenever a transaction
// sent to your wallet fails
(tx_to == ' 0x4B16c5dE96EB2117bBE5fd171E4d203624B014aa') &&
A contract (0x...aeC9B) you're monitoring on Ethereum
mainnet just minted another NFT (0x...aeC9B)
// Any new ERC721 or ERC1155 NFT is minted.
'0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef' && tx_logs_topic1 ==
'0x0000000000000000000000000000000000000000000000000000000000000000' && tx_logs_topic3_int > 0) || (tx_logs_topic0 ==
'0xc3d58168c5ae7397731d063d5bbf3d657854427343f4c083240f7aacaa2d0f62' && tx_logs_topic2 ==
'0x0000000000000000000000000000000000000000000000000000000000000000') || (tx_logs_topic0 ==
'0x4a39dc06d4c0dbc64b70af90fd698a233a518aa5d07e595d983b8c0526c8f7fb' && tx_logs_topic2 ==
Use our flexible expression language to target block data, such as block size, miner address, and gas data.
Target specific transaction data, such as the sender and receiver addresses, input, and value transferred.
##### Transaction log data
Target transaction log data such as contract address, topic hashes and data - evaluated in hex or integer format.
View expressions[Read docs](##### QuickAlerts REST API
Integrate QuickAlerts directly into your applications with our powerful REST API, making it easier than ever to handle real-time blockchain events dynamically. QuickAlerts REST API also enables users to use QuickAlerts with additional chains like Bitcoin and Doge.
Get started today by creating a QuickAlerts API key 
We're excited to provide this new service to our customers to further enable real-time alerting.
##### A return that gives you options
QuickAlerts expressions enable you to receive a custom feed of actionable blockchain data in real-time!
### Receive real-time notifications of on-chain events happening across multiple blockchain networks, including Ethereum, BNB Smart Chain, and more
##### BNB Smart Chain
Mainnet - Available via QuickAlerts REST API
Mainnet - Available via QuickAlerts REST API
##### Ethereum Beacon Chain
## Ready to get started?
Boot your QuickNode account in seconds and get access to 55 different chains. Our globally distributed, auto-scaling, multi-cloud network will carry you from MVP all the way to enterprise.The industry's best trust us, and so can you.
Create a free account us](/contact-us)![Illustration of Getting Started](© 2024 QuikNode
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* Write for us, make money! 
* Wall of Love
* Preferred Partner Network
* Terms & Conditions
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