Hello I am going to develop app for show data from stockmarket. Yahoo and Google only gives details of specific Symbol data but I need all company list with symbols or ID which covers in NSE/BSE.
Check the below link
http://www.barchartondemand.com/freemarketdataapi.php
or you can can the following they are free, they generate Json, though for different exchanges you need to ensure that correct syntax is used. even Yahoo finance works well, but it has some issues regarding NSE and BSE data, which is always generated Null
Google Finance - NSE
URL - http://www.google.com/finance/info?q=NSE:AIAENG,ATULAUTO,
Google Finance - BSE
URL -http://www.google.com/finance/info?q=BOM:524091,532683,
Other Data Feeds (Json)
URL - http://live-nse.herokuapp.com/?symbol=AIAENG,ATULAUTO,
Python Utility (NSE)