I am also facing the same issue..not fetching option greek data... Pls check if the syntax is correct.

orderparams = {
"name": "BANKNIFTY18SEP2451800CE",
"expiry": "18SEP2024"
}
optionGreek=smartApi.optionGreek(orderparams)
logger.info(f"OptionGreek : {optionGreek}")

[E 240913 15:55:53 smartConnect:243] Error occurred while making a POST request to https://apiconnect.angelone.in/rest/secure/angelbroking/marketData/v1/optionGreek. Error: Invalid expiry date. URL: https://apiconnect.angelone.in/rest/secure/angelbroking/marketData/v1/optionGreek, Headers: {'Content-type': 'application/json', 'X-ClientLocalIP': '127.0.0.1', 'X-ClientPublicIP': '106.193.147.98', 'X-MACAddress': '80:81:1f:ea:10:7c', 'Accept': 'application/json', 'X-PrivateKey': 'A6m1pZof', 'X-UserType': 'USER', 'X-SourceID': 'WEB'}, Request: {'name': 'BANKNIFTY18SEP2451800CE', 'expiry': '18SEP2024'}, Response: {'message': 'Invalid expiry date', 'errorcode': 'AB9022', 'status': False, 'data': None}

I am getting the error - Error occurred while making a POST request to https://apiconnect.angelone.in/rest/secure/angelbroking/user/v1/logout. Error: Entered client code is wrong.

My Client code is : S51536734 . I am getting the session data using the same client code.

{'status': True, 'message': 'SUCCESS', 'errorcode': '', 'data': {'clientcode': 'S51536734', 'name': 'SANADIIP KUMAARR', 'email': '', 'mobileno': '', 'exchanges': ['nse_fo', 'nse_cm', 'cde_fo', 'ncx_fo', 'bse_fo', 'bse_cm', 'mcx_fo'], 'products': ['MARGIN', 'MIS', 'NRML', 'CNC', 'CO', 'BO'], 'lastlogintime': '', 'broker': '', 'jwtToken': 'Bearer eyJhbGciOiJIUzUxMiJ9.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.HfHgjaib_uoEksVkAJ1DljURIULF92XzAjxymb0hjhIO1yFN-GVAMbAPBOlU3rubmweF-CwzeWxS63QDXqef5A', 'refreshToken': 'eyJhbGciOiJIUzUxMiJ9.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.3nEwQY-rnuI5Rfgq97e1St1XlIxMNkSeC_OR-jnaOZFWm1xd4-45qCIu_yFzF3SZhz4LSw9HbjcFhYBGDvQqhQ', 'feedToken': 'eyJhbGciOiJIUzUxMiJ9.eyJ1c2VybmFtZSI6IlM1MTUzNjczNCIsImlhdCI6MTcyNjE4NTc5NSwiZXhwIjoxNzI2MjcyMTk1fQ.f5usz80Z9TJZb_TYbziGM5BKSFn6r-MDi3xdt0GqJGWOFb5F3JksfpifGEzXDjjF3XPg9rQZKsBrLqEKh0attQ'}}