A mixer exposure check detects whether a wallet interacted with cryptocurrency mixers like Tornado Cash that flag AML systems; Plastron identifies direct and indirect mixer exposure free across seven EVM chains.

Cryptocurrency mixers — services and protocols that break the transaction link between sending and receiving addresses — are classified as high-risk money laundering vehicles by every major financial regulator. The landscape includes centralized mixing services, smart contract protocols like Tornado Cash and Railgun, and Bitcoin-focused tools like Wasabi Wallet's CoinJoin implementation and JoinMarket. OFAC has designated Tornado Cash and Blender.io, making direct interaction with these protocols a sanctions violation for US persons. Beyond the sanctioned protocols, non-sanctioned mixers still create severe compliance flags at regulated exchanges because they are consistently associated with illicit fund laundering. The exposure problem is not limited to users who intentionally used mixers. DeFi yield strategies, liquidity pool participation, and peer-to-peer ETH trades all create paths through which mixer-tainted funds can reach ordinary wallets without the recipient's knowledge. When you deposit to an exchange, their blockchain analytics system traces the full counterparty graph of your wallet. Any address in that graph that transacted with a mixer — directly or indirectly — creates a flag in their system. How severely that flag is treated depends on the hop distance, the transaction volume, and the specific mixer involved. Understanding your mixer exposure before depositing is the starting point for managing this risk.