Webhook Types

List of all the Alchemy Notify webhook types to stream web3 data in real-time

Alchemy Notify is used to subscribe to event notifications that occur on your application. You can create a webhook to receive notifications on different types of on-chain activity.

Below are the Alchemy webhook types and their supported networks.

Webhook TypeDescriptionNetwork
Custom WebhooksCustom Webhooks allows you to track any smart contract or marketplace activity, monitor any contract creation, or any other on-chain interaction. This gives you infinite data access with precise filter controls to get the blockchain data you need.All EVM
Mined TransactionThe Mined Transaction webhook notifies your app when a transaction sent through your app (using your API key) gets mined. This is useful for you to further notify the users of your app about the status of the transaction.All EVM
Dropped TransactionsThe Dropped Transaction webhook notifies your app when a transaction sent through your app (using your API key) gets dropped. This is useful for you to further notify the users of your app about the status of the transaction.All EVM except Base Sepolia
Address ActivityAlchemy's Address Activity webhook tracks all ETH, ERC20, ERC721 and ERC1155 transfers. This provides your app with real-time state changes when an address sends/receives tokens or ETH. You can specify the addresses for which you want to track this activity. A maximum of 50,000 addresses can be added to a single webhook.All EVM
NFT ActivityThe NFT Activity webhook allows you to track ERC721 and ERC1155 token contracts for NFTs. This provides your app with real-time state changes when an NFT is transferred between addresses.All EVM except Base and zkSync Era
NFT Meta UpdatesThe NFT Metadata Updates webhook allows you to track metadata updates for ERC721 and ERC1155 token contracts for Ethereum and Polygon NFTs. This notifies your app when the metadata for an NFT is updated.Ethereum, Polygon Mainnets