# Evm Audit Erc721

> EVM smart contract audit checklist for ERC721/ERC1155 tokens. Covers weird NFT behaviors, dual-standard tokens, wrapped/legacy collections, permit issues, fractionalization, pausability, blacklists, and upgradeable NFTs. Use when auditing protocols that interact with arbitrary ERC721/ERC1155 tokens. Load references/checklist.md for the full checklist.

- Skill: `austintgriffith/evm-audit-erc721` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add austintgriffith/evm-audit-erc721`
- Raw SKILL.md: https://api.skillmd.com/api/skills/austintgriffith/evm-audit-erc721/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Security
- Author: austintgriffith (https://skillmd.com/u/austintgriffith)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/austintgriffith/evm-audit-erc721

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# ERC721/ERC1155 Audit Skill

## Overview
Non-obvious security edge cases for protocols interacting with ERC721 and ERC1155 tokens. Based on real-world token behaviors that have caused exploits.

## Reference Files
- **references/checklist.md** — Full audit checklist, load this when auditing NFT-related protocols