I’m trying to look up the instrument token for BANKNIFTY 25th Nov 2021 Weekly Expiry(Lets say 38000 PE). From NSE site I can see this expiry available here https://www.nseindia.com/option-chain and it looks to be active. But I’m not able to find the instrument token in Kite Website, app or API. Am I missing something ? Can anyone help me with the intrument token.
Yep 
You’re referring to a monthly contract, i.e. BANKNIFTY NOV 38000 PE which expires on last Thursday of the month.
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@Arjun_Oberoi I was searching a weekly contract. I wasn’t aware that there is no weekly expiry for the last thursday in a month.
To any one else who might need this, please go through this thread Change in format of Weekly options instruments - Kite Connect developer forum