eth_getLogs / on-chain event logs / EVM event reader / Transfer event scan / ERC20 Transfer logs / NFT mint logs / DEX swap events / multi-chain log scanner / log indexer / smart contract event reader. Generic eth_getLogs across Base / Ethereum / Arbitrum / Optimism / Polygon / BSC via public no-auth RPC. Supports address + up to 4 topics (with OR arrays), from/to block range, and a 'last_n_blocks' convenience param. Hard-capped at 5,000 logs and 10,000-block range per call.