Display EOD stock and option price in Web/Mobile App


We are building a fintech application for the retail traders. The app displays End-Of-the-Day stock and option prices from NSE/BSE. To start with, we would like to download the EOD prices from stock exchange websites in CSV format and update our database.

My question is do we need to get permission from the exchanges to do this; i.e., display stock and option prices sourced from the exchanges in our web and mobile apps? If yes, please advise how to get their permission. Appreciate your help. Thanks.