> ## Documentation Index
> Fetch the complete documentation index at: https://docs.extractor.live/llms.txt
> Use this file to discover all available pages before exploring further.

# Non-Fungible Token (EIP-721 compatible)

> Recommended Hacken Extractor triggers for ERC-721 / EIP-721 NFT contracts — monitor mints, transfers, and supply anomalies that signal exploits.

Implementations may have some differences, but all requirements of the [standard](https://eips.ethereum.org/EIPS/eip-721) must be met.

### Monitor the minting of new tokens

**Trigger:** Event Parameter *(coming soon)*

**Parameters:**

* **event:** Transfer
* **argument:** from
* **comparator:** equal to
* **value:** 0x0000000000000000000000000000000000000000

**Severity:** Critical

**Alerts:** On

**Use cases:**

* If your NFT collection is already complete and you are not expecting any new tokens to be created, then it is particularly important to monitor the creation of new tokens with unique IDs.


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