const Etherscan = require('node-etherscan-api') // Replace the value below with the your Etherscan token const TOKEN_API = 'YourApiKeyToken' // Creating the Etherscan instance const etherscan = new Etherscan(TOKEN_API) // Creating a request for account balance in Ether (default returns in Wei) etherscan .getAccountBalance('0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae', 'eth') .then(balance => { // Working with the balance here console.log(balance) })