Context:
POST /api/v2/webhooks returns 502 Bad Gateway. My consumer times out at 10s. Genesys retries 3 times, then stops. No DLQ config in the UI.
Question:
Is it possible to implement a dead letter queue via the API? I want to capture failed payloads for manual replay. My current JS handler:
app.post('/webhook', (req, res) => {
// logic
res.status(200).send();
});
Where do I hook in?
I’d suggest checking out at shifting the retry logic from Genesys Cloud to your consumer side. The 502 usually means your lambda or server crashed before sending a response, not that Genesys failed.
Cause:
Genesys Cloud has a hard 10-second timeout. If your backend is doing heavy ServiceNow integration work, it likely exceeds this. The platform retries three times, but if the root cause is processing time, those retries will also fail.
Solution:
Implement an async pattern. Acknowledge the webhook immediately, then process the payload in the background. If processing fails, push the payload to a dead letter queue (like AWS SQS DLQ) for manual replay.
app.post('/webhook', async (req, res) => {
// Acknowledge immediately to prevent 502/timeout
res.status(200).send('Received');
try {
await processGenesysPayload(req.body);
} catch (error) {
// Send to DLQ for manual retry
await sendToDLQ(req.body, error);
}
});
This stops Genesys from marking the webhook as failed due to your processing latency.
If I remember correctly, you can mitigate this by configuring the retryCount in the webhook definition via Terraform, but the 10s timeout is a hard limit at the Genesys edge, so no amount of retry logic will save a slow backend.
The docs actually state that retryCount in the webhook definition only controls the initial delivery attempts. It does not create a persistent dead letter queue. Once those retries exhaust, the payload is dropped. This is a critical distinction for inbound message flows where data loss is unacceptable.
You must implement your own DLQ logic within the consumer. If you return 202 Accepted immediately, Genesys considers the delivery successful. You then process the payload asynchronously. If processing fails, push the event to an SQS dead letter queue or similar store.
Example Node.js pattern:
app.post('/webhook', async (req, res) => {
try {
// 1. Acknowledge immediately to avoid 502
res.status(202).send('Accepted');
// 2. Process async
await processPayload(req.body);
} catch (err) {
// 3. Send to DLQ
await sendToDLQ(req.body, err);
}
});
This decouples the HTTP handshake from the heavy lifting. The suggestion above about async patterns is correct, but you must ensure your processPayload function does not block the response.
The easiest fix here is this is…
app.post('/webhook', (req, res) => {
const payload = req.body;
// Immediately acknowledge to Genesys to stop retries
res.status(200).send();
// Async processing with DLQ logic
processPayload(payload)
.catch(err => {
console.error('DLQ Push:', err);
// Push to SQS/SNS DLQ here
});
});
The documentation states, “The webhook endpoint must respond with a 2xx status code within 10 seconds.” Your 502 indicates the connection was reset before the response was sent, often due to synchronous blocking.
You cannot configure a server-side DLQ in Genesys Cloud for webhooks. The platform drops the event after three failed attempts. If you return 202 Accepted or 200 OK immediately, Genesys considers the delivery complete. You must handle the persistence and failure routing on your end.
Verify your token scope includes webhook:write if you are modifying webhook configs via API. The documentation states, “The access token must contain the required scopes for the requested resource.” Without it, you might be hitting auth errors masked as gateway issues.