We’ve set up a webhook in Genesys Cloud to push conversation.update events to our internal Node.js 18 Lambda function. The goal is simple: extract the participant state changes and update a local database.
The issue is that the event payload structure seems inconsistent or I’m missing something obvious about how the Lambda handler receives the POST body. When I log the raw event object inside the handler, the structure doesn’t match the standard Genesys webhook documentation examples I’ve seen online. The body field is a string, not a parsed JSON object, which I expected AWS Lambda to handle automatically for API Gateway triggers, but this is a direct webhook target.
Here’s the relevant from index.js:
exports.handler = async (event, context) => {
console.log('Raw event:', JSON.stringify(event));
// Attempting to parse body
let body;
try {
body = typeof event.body === 'string' ? JSON.parse(event.body) : event.body;
} catch (e) {
console.error('Parse error:', e);
return { statusCode: 400, body: 'Invalid JSON' };
}
console.log('Parsed body:', JSON.stringify(body));
if (!body.data) {
console.log('No data key found in payload');
return { statusCode: 200, body: 'OK' };
}
// Process data...
};
The logs show the body is parsed correctly, but the data property is always undefined. The JSON structure looks like this in the logs:
{
"id": "abc-123",
"type": "conversation.update",
"timestamp": "2023-10-27T10:00:00Z",
"payload": {
"id": "call-xyz",
"participants": [...]
}
}
Notice it’s payload, not data. The documentation often refers to the inner object as data in generic event examples, but the actual Genesys webhook sends it under payload.
Environment details:
- Runtime: Node.js 18.x
- Trigger: Genesys Cloud Webhook (POST)
- Auth: Basic Auth header present in
event.headers - Status: Returning 200 OK to Genesys, so the webhook isn’t retrying
Am I misreading the payload structure? Or is there a configuration in Genesys Cloud that changes the key name from payload to data? I’ve checked the webhook settings in Admin > Integrations > Webhooks, but I don’t see a toggle for payload format.
Also, should I be validating the signature header X-Genesys-Signature manually in the Lambda, or does the platform handle that before the request hits my function? I see the header in the logs, but I’m not sure what the expected hash algorithm is.