For a free service you can call google finance web services or yahoo finance web services, but both are deprecated but are still working.
http://finance.yahoo.com/webservice/v1/symbols/IDFC.NS/quote?format=json&view=detail
in above URL:
IDFC is the symbol of security
.NS stands for NSE
For BSE just modify NS to BO
for google web service:
NSE:
http://finance.google.com/finance/info?client=ig&q=NSE:DHFL
for BSE just modify NSE to BOM
Just copy pate above links in a browser to see json output.
