Not getting prices of SBIN

[abhinavsatheesh]

Hey! I just tried out the free API of marketstack. I got the intraday prices of AAPL, MSFT. I am interested in getting the prices of shares in National Stock Exchange of India (NSE). The symbol listed in the marketstack stock search site is SBIN.XNSE. I tried out my link like this
http://api.marketstack.com/v1/intraday?access_key=ACCESSKEY&symbols=HDFCBANK.XNSE

It is returning
{"error":{"code":"no_valid_symbols_provided","message":"At least one valid symbol must be provided"}}

Can someone help?