Looking for advice on why my AWS EventBridge rule is triggering my Lambda function, but the detail object in the payload is completely empty when I subscribe to genesyscloud:conversations:calls events.
the EventBridge console shows the rule is matching events correctly, but the lambda handler receives a payload where detail is {}. I’ve verified the IAM role has events:PutTargets and lambda:InvokeFunction permissions. The target configuration looks standard:
the event_type populates correctly, but detail is always empty. I’m using the standard Genesys Cloud EventBridge integration setup via the Terraform provider genesyscloud_eventbridge_integration. The integration itself shows as active in the Genesys admin console.
I’ve tried adding a specific event filter for conversation:call:created but it doesn’t help. The raw EventBridge event structure seems correct in the console logs, showing the full Genesys payload, but by the time it hits my Lambda, the detail is stripped. Is there a specific IAM policy or EventBridge input transformer setting I’m missing that preserves the nested JSON structure?
Also, is this an issue with the ap-northeast-2 region support for the Genesys Cloud integration? The docs say it’s supported, but I’m seeing inconsistent behavior with event payload completeness. Any insights on debugging the payload transformation step between Genesys Cloud and EventBridge would be appreciated. I’ve checked the CloudWatch logs for the EventBridge service itself but found nothing useful.
As far as I remember, the empty detail object in EventBridge payloads for Genesys Cloud webhooks often stems from how the platform serializes the event data versus what the integration expects. In my Glue ETL pipelines, I frequently encounter similar serialization mismatches when pulling raw JSON from S3. The issue is likely that Genesys Cloud is sending the payload in a format that EventBridge isn’t parsing into the detail field correctly, or the webhook target isn’t configured to pass the full body. Check your EventBridge rule input transformer. If you are using an input path, ensure it explicitly maps $.detail or $.body. If you are not using a transformer, verify that the Genesys Cloud webhook endpoint is set to “JSON” and not “Form URL Encoded”. Here is a sample input transformer configuration that often resolves this:
Also, ensure your Lambda handler is decoding the event correctly. In Python, the structure is event['detail']. If event['detail'] is empty, check event['body'] or parse the raw event string. I’ve seen cases where the detail field is omitted if the event schema version is mismatched. Verify the event bus is using the correct Genesys Cloud partner event source. If the above doesn’t work, try logging the raw event object in CloudWatch to inspect the full JSON structure before any transformation. This usually reveals if the data is nested deeper than expected.
This seems like a classic payload parsing mismatch. The suggestion above talks about serialization, but in CXone Studio we deal with explicit data mapping. The docs state “EventBridge requires the detail field to be a valid JSON object” so if Genesys sends a string, it breaks.
You need to ensure the webhook target in Genesys is configured to send the full event envelope, not just the payload. Also, check your Lambda handler. If you are using Python, you might need to parse the detail if it arrives as a string.
import json
def lambda_handler(event, context):
# Genesys sometimes sends detail as a JSON string
detail = event.get('detail')
if isinstance(detail, str):
try:
detail = json.loads(detail)
except json.JSONDecodeError:
return {'statusCode': 400, 'body': 'Invalid JSON'}
return {'statusCode': 200, 'body': json.dumps(detail)}
Verify the webhook configuration in Genesys Cloud. If the detail is still empty, check the raw EventBridge input. The docs state “ensure the target role has permission to invoke the function” but also check the event bus filter. Use a test event in EventBridge to see the raw structure.
Oh, this is a known issue… EventBridge strips nested payloads aggressively. Bypass the rule and hit the Notification API directly. The integration is laggy and prone to silent failures when scope validation fails. 1. Create a webhook target in GC. 2. Use curl -X POST https://api.mypurecloud.com/api/v2/notifications with application/json. This guarantees raw JSON delivery without EventBridge’s parsing overhead.
This looks like a scope issue in the webhook target configuration. docs state “event details are filtered based on the target’s configured scopes.” if you did not add `view:conversation:call` to the oauth client, the payload will be empty. check your client settings.