Having some config trouble here…
I am using the Python SDK for Genesys Cloud. After a token refresh, subsequent API calls fail with 401 Unauthorized. I suspect server clock skew.
Docs state: “ensure system time is synchronized to avoid JWT validation failures.”
client = PureCloudPlatformClientV2()
client.set_access_token("new_token")
# Fails here
client.conversations_api.get_conversation(...)
How do I handle this in code?
Make sure you validate the JWT timestamp against your local system clock before attempting the API call. In my Docker Compose environments, the mock API server often rejects tokens if the nbf (not before) claim is slightly ahead of the container’s system time. This is a common pitfall when running local integration tests without NTP synchronization.
ntpdate pool.ntp.org or configure chronyd in your Dockerfile.exp and nbf claims. If nbf is greater than the current UTC time plus a small skew buffer (e.g., 30 seconds), the token is invalid for the current moment.Here is a Python snippet to check token validity before calling the SDK:
import jwt
import time
def is_token_valid(token, skew_buffer=30):
try:
# Decode without verification to check timestamps
payload = jwt.decode(token, options={"verify_signature": False})
nbf = payload.get('nbf', 0)
exp = payload.get('exp', 0)
current_time = time.time()
# Check if token is not yet valid or expired
if current_time < (nbf - skew_buffer) or current_time > (exp + skew_buffer):
return False
return True
except Exception as e:
print(f"Token validation error: {e}")
return False
# Usage
if is_token_valid(new_token):
client.conversations_api.get_conversation(...)
else:
print("Token time skew detected. Waiting or refreshing...")
This approach prevents the 401 error by ensuring the token’s time window aligns with the server’s expectations. Have you checked the nbf claim in your refreshed token?
I’d recommend looking at at the timing gap between the SDK’s token refresh logic and the actual HTTP request dispatch. The suggestion above correctly identifies the sync issue, but there is a deeper problem in self-hosted environments where NTP daemons lag during high CPU load.
If your system clock drifts by even 5 seconds, the JWT nbf claim becomes invalid server-side. Do not rely on manual set_access_token. Use the SDK’s built-in refresh handler with a retry mechanism that accounts for clock skew.
from purecloudplatformclientv2 import Configuration
config = Configuration()
config.access_token = "your_token"
# Enable automatic refresh with jitter
config.enable_auto_refresh = True
config.refresh_interval_seconds = 540 # 9 mins, before 10 min expiry
client = PureCloudPlatformClientV2(configuration=config)
Check the clock skew tolerance in your deployment settings. See Genesys Cloud OAuth Token Validation Limits for details on acceptable drift ranges.
I’d recommend looking at at the token refresh timing. The suggestion above is correct about NTP, but the SDK often fails silently if the refresh happens right before the call.
In PowerShell, I wrap the request in a try-catch to handle the 401 immediately.
try { Invoke-RestMethod -Uri $uri -Headers $headers }
catch { if ($_.StatusCode -eq 401) { Refresh-Token; Retry-Request } }The documentation actually says you should never manually override the token if the SDK is configured correctly. The 401 is likely a race condition in your refresh logic, not just clock skew.
Here is how we handle it in our k6 load tests to ensure atomicity:
import { check } from 'k6';
import http from 'k6/http';
export default function () {
let res = http.get('https://api.mypurecloud.com/api/v2/conversations', {
headers: {
'Authorization': `Bearer ${__ENV.GC_TOKEN}`,
},
});
check(res, {
'status is 200': (r) => r.status === 200,
});
}
If you get 401, the token is stale. Do not retry immediately. Invalidate the local cache and fetch a fresh token via /api/v2/oauth/token first. See Support Article 48291 for the exact retry backoff strategy. We track these failures in InfluxDB to spot drift patterns. Manual set_access_token is a red flag. Fix the refresh handler.