Ethereum (ETH)

Ethereum API Documentation with NOWNodes

To interact with the Ethereum blockchain — reading data, sending transactions, or executing smart contracts — for every Web3 needs you need a stable connection to an Ethereum node. Every Ethereum client supports Ethereum RPC (JSON-RPC), providing a standardized set of methods for consistent communication with the blockchain.

Ethereum RPC is a lightweight, stateless protocol using JSON, working over HTTP, WebSockets, or other transport layers. It allows your app to query blockchain data, track transactions, and call smart contracts efficiently.

With NOWNodes, you get fast, reliable Ethereum RPC access without running your own node. Our API provides stable connections to Ethereum Mainnet and Sepolia testnet, enabling real-time blockchain data and event updates. NOWNodes also provides access to Ethereum Archive Data.

NOWNodes Ethereum Interfaces:

• Ethereum Virtual Machine (EVM) – Execute smart contract calls and interact directly with the Ethereum Virtual Machine using Ethereum RPC methods.

• Ethereum BlockBook – Access Ethereum blockchain data via REST, including blocks, transactions, and addresses, through Ethereum RPC.

• Ethereum BlockBook WebSocket – Receive live Ethereum blockchain updates in real-time via WebSockets.

• Sepolia RPC – Connect to the Sepolia testnet via JSON-RPC for testing, development, and staging environments.

• Sepolia BlockBook – REST API for querying Sepolia blockchain data.

• Sepolia BlockBook WebSocket – Get real-time updates from the Sepolia testnet via WebSockets.

• Ethereum Archive Node – gives full historical access to all Ethereum states and data, typically run as an Erigon Archive Node.