Explorers
Etherscan
The definitive Ethereum block explorer processing 1B+ API calls daily. Tracks every transaction, wallet, token, and contract on Ethereum. API V2 unifies 60+ EVM chains under one key — query Base, Arbitrum, BNB and more by changing chainid. Contract verification, token standards checker, multichain portfolio tools, and similar contract search. The starting point for every Ethereum developer.