Approvalscan — Check Token Approvals on EVM Chains

reads Approval events from public RPC · no private key needed · read-only

What are token approvals? When you use a DeFi protocol, you sign an ERC-20 approve() transaction giving that contract permission to spend your tokens. Many protocols request unlimited allowance. If the contract is later exploited, attackers can drain your wallet.

Common sources: Uniswap, PancakeSwap, Aave, 1inch, any NFT marketplace, bridging protocols. Revoke unlimited approvals for contracts you no longer use at revoke.cash (requires wallet connection).

swap crypto after revoking old approvals — 1000+ pairs, no account