kiteconnect.exceptions.TokenException: Token is invalid or has expired.

Hi Sujit,
Still no success, last video in your reference thread is not opening.
I tried to run a simple code to test the API connection & execute one order, below is the script
---------------
import logging
from kiteconnect import KiteConnect
from datetime import datetime, timedelta

# Configure API credentials
api_key = ""
api_secret = ""
access_token = ""

# Logger setup
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(message)s')

def get_nifty_atm_strike(option_type='PE'):
"""Fetch NIFTY ATM strike price for a given option type (CE/PE)."""
try:
nifty_ltp = kite.ltp(["NSE:NIFTY 50"])["NSE:NIFTY 50"]["last_price"]
atm_strike = round(nifty_ltp / 50) * 50 # Nearest strike
expiry = get_nearest_weekly_expiry()

instruments = kite.instruments("NFO")
nifty_options = [i for i in instruments if i['tradingsymbol'].startswith("NIFTY")]

atm_option = next(
(opt for opt in nifty_options if
opt['strike'] == atm_strike and
opt['expiry'] == expiry and
opt['instrument_type'] == 'OPT' and
opt['option_type'] == option_type),
None
)
if atm_option:
return atm_option['tradingsymbol']
else:
logging.error("Failed to fetch NIFTY ATM option symbol.")
return None
except Exception as e:
logging.error(f"Error in fetching ATM strike: {e}")
return None

def get_nearest_weekly_expiry():
"""Get the nearest weekly expiry date."""
today = datetime.now()
weekday = today.weekday()
if weekday >= 3: # If Thursday or later, pick next Thursday
expiry = today + timedelta(days=(7 - weekday + 3))
else:
expiry = today + timedelta(days=(3 - weekday))
return expiry.strftime('%Y-%m-%d')

try:
# Initialize Kite API
kite = KiteConnect(api_key=api_key)
kite.set_access_token(access_token)
logging.info("Successfully connected to Zerodha Kite API.")

# Get NIFTY ATM PE symbol
nifty_atm_pe = get_nifty_atm_strike(option_type='PE')
if not nifty_atm_pe:
raise Exception("NIFTY ATM PE strike could not be determined.")

# Fetch the LTP of the option
ltp_data = kite.ltp([f"NFO:{nifty_atm_pe}"])
ltp = ltp_data[f"NFO:{nifty_atm_pe}"]['last_price']
logging.info(f"Live LTP for {nifty_atm_pe}: {ltp}")

# Define stop loss and target
stop_loss_price = ltp - 10
target_price = ltp + 30

# Place GTT order
gtt_id = kite.place_gtt(
trigger_type="single",
tradingsymbol=nifty_atm_pe,
exchange="NFO",
trigger_values=[target_price, stop_loss_price],
last_price=ltp,
orders=[
{
"transaction_type": "SELL",
"quantity": 50,
"price": target_price,
"order_type": "LIMIT",
"product": "MIS"
},
{
"transaction_type": "SELL",
"quantity": 50,
"price": stop_loss_price,
"order_type": "LIMIT",
"product": "MIS"
}
]
)
logging.info(f"GTT order placed successfully. GTT ID: {gtt_id}")

except Exception as e:
logging.error(f"Error: {e}")
--------------

Below is the error log
2024-12-06 11:15:55,887 - Successfully connected to Zerodha Kite API.
2024-12-06 11:15:55,981 - Error in fetching ATM strike: Incorrect `api_key` or `access_token`.
2024-12-06 11:15:55,981 - Error: NIFTY ATM PE strike could not be determined.

--------
It shows connect to Kite API, then says incorrect API_key

Please help..

can someone please help. my zerodha API subscription is getting useless.

Your app seems fine at our end. You can enabled debug logs of pykiteconnect and check what are the tokens sent exactly. Check for the characters mismatch like O and 0 or trailing or beginning space characters.