Get L2 Balances

main.js

async function main() {

    // query ETH balances on Arbitrum, Base and Optimism

    const chains = [42161, 8453, 10]

    for (const chain of chains) {

        // add your key here
   
        const query = await fetch(`https://api.etherscan.io/v2/api
           ?chainid=${chain}
           &module=account
           &action=balance
           &address=0xb5d85cbf7cb3ee0d56b3bb207d5fc4b82f43f511
           &tag=latest&apikey=YourApiKeyToken`)
           
        const response = await query.json()

        const balance = response.result
        console.log(balance)

    }
}

main()