Blockaid Address Scanning is a security solution designed for Web3 environments that validates cryptocurrency addresses in real time. The tool scans addresses to identify malicious entities and checks whether addresses are associated with OFAC-sanctioned entities. The platform provides multi-chain support, enabling address validation across multiple blockchain networks with chain-specific analysis. It performs entity evaluation to log security and regulatory information on addresses involved in transactions, helping identify fund transfers to malicious addresses and protecting users from address poisoning attacks. The system is integrated directly into Web3 wallets and interfaces, processing over 25 million Web3 addresses monthly. This integration allows the platform to access extensive data and block threats directly within the network where users interact with blockchain applications. Address scanning capabilities include immediate security status assessment of crypto addresses, detection of interactions with sanctioned entities, and prevention of transactions with identified malicious addresses. The tool operates across diverse blockchain ecosystems including Ethereum Mainnet and multiple EVM chains such as Base, Optimism, and Polygon. The solution is designed for cryptocurrency wallets, exchanges, and Web3 applications that require address validation and risk assessment capabilities to protect users from fraudulent transactions and regulatory violations.