Nifty Historical Option Chain Data

Hello Team,

I am using the Fyers API v3 to fetch historical data. The monthly symbol "NSE:NIFTY26JAN25500CE" works fine, but the weekly symbol "NSE:NIFTY2611325500CE" returns error: "{'code': -300, 'message': 'Invalid symbol provided', 's': 'error'}"

Monthly Expiry Code:

data = {
    #"symbol":"NSE:NIFTY26JAN25500CE",
    "symbol":"NSE:NIFTY26JAN25500CE",
    #"symbol":"NSE:NIFTY2611325500CE",
    "resolution":"5",
    "date_format":"1",
    "range_from":"2026-01-09",
    "range_to":"2026-01-09",
    "cont_flag":"1",
}

Weekly Expiry Code

data = {
    #"symbol":"NSE:NIFTY26JAN25500CE",
    #"symbol":"NSE:NIFTY26JAN25500CE",
    "symbol":"NSE:NIFTY2611325500CE",
    "resolution":"5",
    "date_format":"1",
    "range_from":"2026-01-09",
    "range_to":"2026-01-09",
    "cont_flag":"1",
}

Please advise on the correct format for weekly Nifty options or resolve the issue.

Best regards,
Darshan