Algorand demonstration with JS SDK

check_balance.js

const algosdk=require('algosdk');

const server="https://testnet-algorand.api.purestake.io/ps2";
const port="";
const token={
	"x-api-key": "mV *** BY" // fill in yours
};

let client=new algosdk.Algodv2(token,server,port);

let account1 = 'MXSXYFX7XWWVYQHHBLJPJZYUJXY6JXXSOELIVNSRQDFM3NIH73ULFZHQAA';
let account2 = '6NAKWTCPPHB4RZFYS26RT5QDCO6BFNVY3OYJV4WPMGOPDPFOB2GCSR5Z4M';

( async() => {
    let account1_info = (await client.accountInformation(account1).do());
    console.log("Balance of account 1: " + JSON.stringify(account1_info.amount));
    let account2_info = (await client.accountInformation(account2).do());
    console.log("Balance of account 2: " + JSON.stringify(account2_info.amount));
})().catch(e => {
	console.log(e);
})