It's still baby steps - right now you cannot specify the data you want, and it only supports US stocks, but it's a start!
I'd love to hear from you what data and functionalities could be useful for you to have access to, so I can continue improving on this :)
If you input your own stock tickers, it generates a new url that you can share with others. Like here's my current portfolio: https://numeric-replica-441407-p8.ew.r.appspot.com/portfolio...
Best,