Getting 400 Bad Request for particular Instrument Keys, here is the list:
NSE_EQ|INE999A01015
NSE_EQ|INE185E01013
NSE_EQ|INE573K01017
NSE_EQ|IN9155A01020
NSE_EQ|INE732F01019
It seems you’re not using the latest JSON file from Instruments | Upstox Developer API. Make sure to download the file daily to keep your data updated.
Please note that IN9155A01020 is the TATA DVR, and we do not publish data for it. For more information about DVR shares, you can visit: Login Consent - Moneycontrol.