Estimate Charges API suddenly failing for Options/Derivatives (was working earlier)

kondapalli6148

Hi Team,

I am using the Estimate Charges API in SmartAPI. It used to work for options/derivatives, but for the past few days, it started failing.

function that i used:

def transaction_cost_of_ticker(session):
    # Try different symbol formats
    params = {
        "orders": [{
            "product_type": "INTRADAY",
            "transaction_type": "BUY", 
            "quantity": "75",
            "price": "300",
            "exchange": "NFO",
            "symbol_name": "NIFTY",  # Original format
            "token": "58901"
        }]
    }
    response = session.estimateCharges(params)
    summary_total = response["data"]["summary"]["total_charges"]
    print(f"Estimated charges: ₹{summary_total}")
    return summary_total
   
session, _ = initialize_session()
transaction_cost_of_ticker(session)

Error Message:
'Symbol Not Found', 'errorcode': 'AB1009', 'status': False, 'data': None}

Environment Details:
OS: Windows 10
Python: 3.9
SmartAPI SDK: smartapi-python==1.4.8

Observation:

API works fine for Equity.
API fails for Options, which worked earlier.
Payload format has not changed.

Request:

Could you please check if there has been any recent change in the Estimate Charges API affecting options/derivatives?
Also, please suggest the correct payload or workaround if this is an issue on your side.

Thanks,
kondapalli