Wallet balance: native coin + token balances with USD values for any wallet, read live onchain. EVM (Ethereum, Base, Arbitrum, Polygon in one call; ENS names work) or Solana (SOL + SPL tokens). Pass address, optional chain and tokens. Returns per-chain balances, prices and total USD. 0.003 USDC (Base/Polygon/Arbitrum/Solana/Avalanche/Sei). Errors are never charged: 400 bad input, 422 nothing found or target unreachable, 503 busy.