Smart Contract Security
ERC-20 Token Allowance & Approval Checker
Inspect approved token spending limits granted to decentralized exchanges, lending pools, and NFT marketplaces to identify unlimited approval risks.
Default: Uniswap Universal Router
Default: Circle USDC (0xA0b8...B48)
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Token Allowance Security FAQ
In Ethereum, smart contracts cannot access your tokens unless you call the approve() function. This creates an allowance mapping granting a designated spender (such as Uniswap) permission to withdraw tokens up to your approved amount.