Ethereum (ETH) API Documentation

Ethereum

Ethereum (ETH) is a Layer 1 smart contract platform finalized by proof-of-stake validators since the Merge on September 15, 2022. Contracts are commonly written in Solidity or Vyper and compiled to EVM bytecode, while execution clients re-execute transactions and maintain the account-based global state, contract storage, receipts, and blocks. That EVM execution plus account model is replicated across many Layer 1 and Layer 2 networks, making Ethereum’s JSON-RPC semantics a shared baseline across the wider EVM ecosystem.

Ethereum API Methods and Endpoints

NOWNodes exposes Ethereum's interface, plus a few others, depending on what your integration needs: JSON-RPC for reading chain state and broadcasting transactions, WSS (WebSocket) for real-time subscriptions and events, Blockbook for indexed address, balance, transaction, and block lookups, and Trace/Debug for step-level execution analysis. Archive mode extends any of these to historical states and data beyond standard retention.

Browse the interfaces below for endpoint details, request parameters, response formats, and integration examples. Create an API key, select Mainnet or Testnet, choose the required interface, and start sending requests from your application.

Weighing Ethereum RPC providers against each other? Read the comparison guide on our blog — this page stays focused on integration reference.