permit2-checker

name	permit2-checker
description	Inspect Uniswap Permit2 sub-approvals for any wallet on Base or Ethereum
version	1.0.0
tags	["security","defi","permit2","approvals","base","ethereum"]
author	Axiom

permit2-checker

Check Permit2 token approvals that are invisible to most wallets and block explorers.

When to use

• Auditing wallet security (what spenders have active Permit2 approvals?)
• After swapping on Uniswap/1inch/Paraswap — verify the sub-approval was scoped correctly
• Checking for unlimited or expired approvals that should be revoked
• Agent security: verify an agent wallet's Permit2 exposure before granting it tokens

Usage

node permit2-checker.mjs <wallet> [--chain base|mainnet] [--tokens 0x...] [--spender 0x...] [--all] [--json]