token-approval-checker

name: token-approval-checker description: Check ERC20 token approvals for a wallet address, identify unlimited approvals and risky spenders, and suggest revocations. version: 1.0.0 author: aidamidami tags:

• web3
• security
• approval
• erc20
• allowance
• revoke triggers:
• type: keyword keywords:
  • token approval
  • allowance
  • revoke
  • revoke approval
  • unlimited approval priority: 85 parameters:
• name: address type: string required: true description: Wallet address to check
• name: chain type: string required: false description: Chain (ethereum, polygon, arbitrum, optimism, base) prerequisites: env_vars:
  • ETHERSCAN_API_KEY scripts: enabled: true working_directory: ./scripts definitions:
  • name: approval_checker description: Scan ERC20 approvals for an address and assess risk type: python file: approval_checker.py timeout: 60

Token Approval Checker

Check ERC20 token approvals for a wallet address: identify unlimited approvals and unknown spenders, and get revocation suggestions.

Features

• Scan Approval events for tokens the address has interacted with
• Flag unlimited approvals
• Distinguish known safe spenders (e.g. Uniswap routers) from unknown ones
• Output actionable revocation recommendations

Environment Variables

Input Example

{
  "address": "0x...",
  "chain": "ethereum"
}

Best Practices

1. Review approvals periodically and revoke unused ones
2. Prioritize revoking unlimited approvals and unknown spenders
3. Use Revoke.cash or call approve(spender, 0) on the token contract to revoke