Wallet profile computed from raw chain data: label (exchange, whale, active_trader, fresh_wallet, dormant), 0-100 activity score with plain-English reasons, native + USDC balance, tx count, first/last activity, whether it is a known exchange wallet, and its whale transfer history and netflow direction in the store's own 30-day whale tracker. Chains: ethereum, base, solana. Cached 10 min; no charge if the chain RPC fails