Web Messaging participant attributes missing in Architect Inbound Message flow

Invoke-RestMethod returns the attributes fine via API, but they are null in Architect.

Env: PowerShell 7.4, GC Org
Goal: Route based on priority attr

The attribute is set on the participant via the Web Messaging API. The Architect flow uses a Data Action to fetch interaction.participants[*].attributes. The attribute is not in the list. Is there a specific scope or API call needed to persist this for Architect consumption?

You need to verify the attribute propagation delay. Web Messaging attributes often lag behind the initial interaction fetch in Architect.

Add a Wait block for 2-3 seconds before your Data Action, or use the Get Interaction Details action with a refresh flag to ensure the latest participant data is loaded from the cache.

{
 "action": "GetInteractionDetails",
 "refresh": true
}

Pretty sure the issue isn’t propagation delay but how the Web Messaging SDK pushes custom attributes versus how Genesys Cloud stores them in the interaction object. The GetInteractionDetails refresh flag often pulls stale cache if the attribute was set on the participant level but not merged into the main interaction attributes map. You need to ensure your web client sends the attributes in the createInteraction payload or uses the updateParticipant endpoint with the correct scope. In Architect, don’t just query interaction.participants[*].attributes. Instead, use a Data Action to call GET /api/v2/interactions/{interactionId} and parse the JSON response directly. The participant attributes are often nested under participants[0].attributes but require explicit JSON parsing to access specific keys like priority. Use the JSONPath module to extract $.participants[0].attributes.priority. This bypasses the internal caching quirks of the standard Get Interaction action. Here is the JSONPath expression you need in the Data Action output mapping:

{
 "expression": "jsonPath($.participants[0].attributes.priority, $data)"
}

the refresh flag in the previous post is correct. add a 2s wait before the data action to sync the participant attributes. works every time.