Vault evaluator for Hyperliquid copy-trading vehicles. POST {vault}. Returns composite vault_quality_score (0-100) factoring: leader's own trading skill, depositor concentration (top-1 share = whale-dependent), redemption pressure (withdrawals/deposits ratio), commission rate. Plus lifetime stats and top 5 depositors. Built for copy-trade-vetting bots — NO equivalent service exists; vault data is unique to perps DEXs.