Multi-chain EVM RPC across 48 chains — native balance, tx count, contract check, latest block & gas price via public JSON-RPC. Ethereum, Base, Arbitrum, Optimism, Polygon, BSC, Avalanche, Blast, Scroll, Linea, Mantle, zkSync, Berachain, Sonic, Unichain, World Chain + 32 more. Pass 'address', 'chain/address', or 'chains' to list all. No API key — one endpoint, every major chain, for on-chain, wallet and trading agents.