Web Messaging SDK: Custom guest attributes not persisting for authenticated users

NICE CXone API & Integrations
1

We are instrumenting the Genesys Cloud Web Messaging SDK (v1.2.0) to track customer journey metrics in New Relic. The setup involves identifying users before they start a chat session. We’ve configured the widget to accept custom attributes via the onReady callback, but the attributes aren’t showing up in the conversation metadata in the Genesys UI or the analytics export.

Here’s the initialization code running in the browser context:

pureCloudMessaging.init({
 organizationId: 'ORG_ID',
 deploymentId: 'DEPLOY_ID',
 onReady: (messaging) => {
 const user = getCurrentUser(); // Returns { id: '123', name: 'Sam' }
 messaging.setGuestAttributes({
 'userId': user.id,
 'customerTier': 'Gold',
 'source': 'mobile-app'
 });
 console.log('Attributes set:', messaging.getGuestAttributes());
 }
});

The console log confirms the attributes are stored locally in the widget instance. However, when I inspect the API response from GET /api/v2/conversations/guests/{guestId} shortly after the session starts, the attributes object is empty.

{
 "id": "guest-uuid",
 "attributes": {},
 "externalContactId": null
}

We’ve verified that the deployment configuration allows custom attributes. The setGuestAttributes method seems to be a local state operation until the first message is sent or the session is explicitly started. Is there a specific SDK method we need to call to flush these attributes to the server before the startSession call? Or is there a delay in the propagation that we’re missing?

We’ve tried calling messaging.startSession() immediately after setting the attributes, but the result is the same. The userId is critical for our New Relic entity correlation, so we can’t wait for the first message to trigger the sync. Any pointers on the correct sequence of SDK calls?

2

The issue isn’t the SDK initialization. The Web Messaging SDK sends those custom attributes as transient session data, not as persistent user metadata. If you’re expecting them to stick around for analytics or show up in the Genesys UI after the chat ends, you’re hitting a design limit. The widget drops them once the connection closes unless you explicitly persist them.

You need to hook into the onMessage event and push those attributes to the external data service or use a Data Action in Architect to save them to the user’s profile via the /api/v2/users/{userId} endpoint. But since you’re doing this client-side, the easier route is using the setUserData method correctly after authentication, not just in onReady.

Here’s how to force persistence using the SDK’s setUserData before the conversation starts:

genesyscloud.widget.onReady(() => {
 const user = genesyscloud.widget.getUser();
 
 // Ensure user is authenticated first
 if (user.isAuthenticated) {
 user.setUserData({
 customAttributes: {
 newrelic_session_id: 'your-nr-id-here',
 journey_step: 'pre_chat'
 }
 });
 
 // Optional: Force a sync if needed
 user.syncUserData();
 }
});

Also check your webhook retry policy. If the external system (New Relic) is slow to respond, the Genesys platform might drop the event. Verify the dead letter queue in /api/v2/webhooks for failed deliveries. If you see 429s, bump the retry backoff.

One more thing: make sure your Architect flow isn’t stripping these attributes. If you’re using a “Set Participant Data” action, it might be overwriting the SDK-sent data. Check the flow logs.

This should fix the persistence issue. If it doesn’t, look at the browser console for CORS errors blocking the sync call.

2 Likes
3

Platform SDK for JS explicitly treats those browser init attributes as ephemeral session variables, so you’re completely right that they won’t persist if you just pass them through the client-side configuration. To actually force them to stick, you have to intercept the incoming payload on your Node.js backend and push them directly to the /api/v2/users/{userId} endpoint before the conversation routing logic takes over.

First, you need to grab your PlatformClient instance. Once that’s initialized, you execute the update call like this:

await platformClient.UsersApi().updateUser(userId, {
 attributes: { journeyStage: req.body.stage }
}, { scope: 'user:write' });

You also have to manually set the Authorization header on that request, since the browser-scoped token expires far too quickly for reliable server-side handoffs. On the webhook side, you must ensure your endpoint returns a 200 OK response immediately. The platform’s gateway is notoriously strict; if your response time exceeds 3000ms, it silently drops the payload. Honestly, wiring this up is a massive pain. The rigid timeout window kills the flow every single time, and debugging the handshake is just a tedious grind.

4

Tried the webhook route, but it didn’t stick. Switched to the user endpoint and the attributes are finally showing up in the UI. The analytics export is still null though.

const platformClient = require("genesys-cloud-platform-client");
const userApi = new platformClient.UsersApi();
userApi.patchUser(userId, { customAttributes: { journey_step: "checkout" } });
2 Likes
5

The patchUser call persists correctly to the profile file, which explains the UI update. The analytics export returning null is a known architectural gap in how Genesys Cloud separates user metadata from conversation-level tracking. Genesys keeps these siloed unless you explicitly push them into the conversation object itself. Could you clarify if your current integration is routing these attributes through a routing or WFM API first?

Switch to patching the conversation instead of the user. The /api/v2/communications/communications/{communicationId} endpoint accepts custom attributes that actually flow into the analytics pipeline. Something like this on your backend:

const communicationsApi = new platformClient.CommunicationsApi();
await communicationsApi.patchCommunication(communicationId, {
 customAttributes: {
  journey_step: "checkout",
  newrelic_session_id: "sess_94821"
 }
});

You will also need to verify the data model settings in the admin console. Sometimes the custom fields get created but are not flagged for export inclusion. Check the includeInExport flag on the attribute definition. Five9 handles this mapping automatically during provisioning, but Genesys requires that toggle to be flipped before the CSV export picks it up. As a workaround, if the console toggle is restricted in your tenant version, you can push the attributes via the bulk data API and map them in the reporting dashboard manually. Are you currently using the standard attribute builder or a custom schema import?

The rate limits on the communications patch endpoint are tighter than the user endpoint, so throttle the requests if you are seeing volume spikes. Just queue them through a simple retry loop with exponential backoff. From a DevOps perspective, I recommend adding a circuit breaker pattern here to prevent queue buildup during peak contact center hours. The export will start populating once the next daily job runs. Check the job scheduler if it lags past midnight JST. Do you have any custom batch dependencies configured that might be delaying the nightly ETL process?