Display the contents of a wallet on a website

Question

I want to dynamically display the contents of a Monero wallet via a simple HTTP fetch from a web page.

Something like:

var walletViewKey = "48732ifhsdjf8w9";
var walletContents = fetch(moneroBlockChain + walletViewKey);
document.getElementByID("wallet").innerText = walletContents

Is this possible with any existing client side SDK or something? Ideally I want to do this from just a simple page hosted on github pages, for example.

When I looked at using a monero-javascript SDK, the only options I saw involved creating a brand new wallet on the server. I want someone to be able to simply provide a view key and that's it.

Is this possible?