What is the standard approach to pass custom variables through an IVR flow using the Set Participant Data action in Genesys Cloud Architect? I have been following the documentation which states, “The Set Participant Data action allows you to set custom data attributes on the participant.” However, my implementation consistently fails to persist the data. I am attempting to set a custom attribute named customer_tier with a value derived from a previous API lookup. The JSON payload I am constructing for the action input is {"data": {"customer_tier": "gold"}}. When I run the flow, the action appears to complete without error, but subsequent actions that reference participant.data.customer_tier return undefined. I have verified that the API call preceding this action successfully returns the tier value. I suspect the issue lies in how the data object is structured within the action’s expected schema. The documentation is sparse on the exact nesting level required for the data property. Should the payload be {"customer_tier": "gold"} or must it be wrapped in a specific key? I have tried both variations. The first variation results in the action failing with a validation error regarding unexpected fields. The second variation completes but the data is inaccessible. I need to know the precise JSON structure expected by the Set Participant Data action to ensure the custom variable is correctly attached to the participant context.
I have also attempted to use the Platform API directly to update participant data via PATCH /api/v2/conversations/{conversationId}/participants/{participantId} with the same payload structure. This API call returns a 204 No Content status, indicating success. However, the data still does not appear in the Architect flow context. This suggests a synchronization delay or a scope issue. The documentation notes, “Data set via the API may take a few seconds to propagate to the Architect context.” I have added a delay of 5 seconds after the API call, but the variable remains undefined. Is there a specific method to force the context refresh? Or is the Set Participant Data action fundamentally different from the API update? I need a reliable method to pass this data through the IVR without relying on external API calls for every interaction. Any insight into the correct payload structure and propagation behavior would be appreciated.
Check your payload structure. The Set Participant Data action fails if you pass a raw object instead of a key-value map. Use {"customer_tier": "gold"} not {"data": {"customer_tier": "gold"}}. The API rejects nested wrappers. Verify the field name matches exactly; case sensitivity matters for custom attributes.
The docs actually state the payload must be a flat key-value map, but it doesn’t mention the strict validation on key names that causes silent failures. I ran k6 load tests against /api/v2/conversations/participants with malformed keys and saw 400 errors spike. The suggestion above is correct about the structure, but you need to ensure the key matches the exact custom attribute definition in the organization settings.
Here is the validated payload structure:
{
"customer_tier": "{{lookup_result.tier}}"
}
Steps to verify:
Confirm the custom attribute customer_tier exists in Admin > Organization Settings.
Ensure the value is a string, not a number. Genesys Cloud rejects type mismatches here.
Check the Architect log for 400 Bad Request if it still fails. It usually indicates a typo in the key name.
Do not wrap the data in a data object. The API endpoint expects the raw attributes.
I saw this break in production when developers wrapped the JSON in an extra layer. Keep it flat.
How I usually solve this is by ensuring the payload structure strictly adheres to the flat key-value map requirement while validating the attribute definition in the organization settings. The issue often stems from case mismatches or attempting to nest the data object, which the Genesys Cloud API rejects silently in some Architect contexts.
In my Next.js integrations, I verify the custom attribute exists and is enabled for IVR participants before setting it. The payload must be a direct map of attribute names to values. For example, if your attribute is customer_tier, the JSON should look like this:
{
"customer_tier": "{{lookup_result.tier}}"
}
Do not wrap this in a data object. Additionally, ensure the attribute name matches the exact casing defined in the Genesys Cloud admin console. I often use the PureCloudPlatformClientV2 SDK to fetch the attribute definition first via /api/v2/attributes/attributes to confirm the exact key name before constructing the Architect action payload. This prevents silent failures where the data appears to be set but is not retrievable in downstream actions.