How can I get the instrument details?

I am trying to fetch the Nifty50 instrument data using a feed, but I am stuck on the instruments part.
Could you please share the documentation to get the security_id?

instruments = [(1, “1333”), (0, “13”)]
feed = marketfeed.DhanFeed(
client_id,
access_token,
instruments,
subscription_code,
on_connect=on_connect,
on_message=on_message
)

Hello @hajareshyam

Sure. If you want to fetch data for any instrument, you can do the same by referring to Security ID list here: API Security ID List

Do note that this gets updated every morning, as per exchanges.