Crypto Tools Unveiled to Protect Against $600M+ Approval-Based Exploits
Smart contract approvals can become a security risk if left active, making regular approval audits essential for protecting on-chain assets. According to recent data, approval-based exploits caused over $600 million in losses by the end of Q1 2026.
To mitigate this risk, several crypto tools have been developed to help users identify and revoke unnecessary token permissions. One such tool is Revoke.cash, which connects to a user's wallet and displays every contract that holds spending permission over their tokens across 100+ EVM chains.
Revoke.cash offers paid tiers, starting at $99 a year, and its Premium and Ultimate plans are set for Q2 2026 with features such as auto-revoking for risky contracts. Another tool is Etherscan's Token Approval Checker, which lists approved spenders, original allowances, remaining allowances, associated transaction hashes, and supported token standards.
Other tools, including Rabby Wallet, DeBank, Wallet Guard, MetaMask Portfolio, and Scam Sniffer, offer a range of features such as transaction simulation, approval warnings, phishing detection, and risk engine flags for unlimited approvals. By using these tools in combination, users can strengthen their protection against wallet drainers and malicious contracts.