# Webhook Types

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

> For the complete documentation index, see [llms.txt](/docs/llms.txt).

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 Type                                                | Description                                                                                                                                                                                                                                                                                                                                 |
| ----------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [Custom](/docs/reference/custom-webhook)                         | Custom 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.                                                                                     |
| [Address Activity](/docs/reference/address-activity-webhook)     | Alchemy'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. Specify the addresses for which you want to track this activity via API as well. A maximum of 100,000 addresses can be added to a single webhook. |
| [NFT Activity](/docs/reference/nft-activity-webhook)             | The 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.                                                                                                                                                 |

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  Check the [Chains](https://dashboard.alchemy.com/chains) page for details about product and chain support!

  ![](https://alchemyapi-res.cloudinary.com/image/upload/v1764179964/docs/api-reference/alchemy-transact/transaction-simulation/523fb8a9a9d899921ee1046d0ff1b389967a9976d1c6112ebbbe071ddd1ef374-image.png)
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