Stuck on accessing participant attributes from Web Messaging in an Architect Inbound Message flow. The Electron app injects custom data via POST /api/v2/conversations/webmessaging/{id}/participants but the Architect data action returns null when reading participant.attributes.custom.myKey. GET request to the same endpoint shows the payload attached, yet the flow doesn’t pick it up, which is weird.
Thanks everyone.
the easiest way to fix this is to stop trying to read the attributes directly in the data action during the inbound message event. the participant object in that specific trigger context is often incomplete or stale. instead, trigger a separate ‘get participant’ data action using the participant id from the inbound message payload. this forces a fresh fetch from the api.
steps:
- type: getData
name: fetchParticipant
url: "/api/v2/conversations/webmessaging/{{trigger.conversation.id}}/participants/{{trigger.participant.id}}"
then map fetchParticipant.attributes.custom.myKey. we’ve seen this pattern break in ci pipelines when the initial event doesn’t hydrate the full object. also check if your electron app is using the correct scope for the token generating the post request. missing scopes can cause silent failures on attribute attachment.
I usually solve this by bypassing the initial data action entirely and forcing a fresh fetch. the suggestion above about using a separate getData step is spot on, but there’s a nuance with how Architect caches participant data during the inbound trigger. when the flow starts, the participant.attributes object is often a shallow copy or completely empty depending on the integration type. if you’re coming from a Twilio background, this feels like the <Parameter> variables not being set immediately in the <Gather> verb. you have to explicitly pull the latest state from the API. the fix isn’t just adding the step, it’s chaining it correctly. here’s how the expression should look in the data action config:
{
"url": "/api/v2/conversations/webmessaging/${conversation.id}/participants/${participant.id}",
"method": "GET"
}
don’t try to map participant.attributes.custom.myKey directly in the first step. it will return null. instead, use the fetchParticipant response. the key is accessing the nested object correctly. in the next step, your expression should be fetchParticipant.attributes.custom.myKey. this forces the system to hit the REST endpoint and return the full payload, including those custom attributes injected via the Electron app. it’s a bit of extra work compared to TwiML where parameters are often available immediately, but it’s the only reliable way to handle dynamic custom data in GC. also, watch out for race conditions. if the webhook fires before the participant object is fully hydrated in the DB, even the GET might fail. adding a small delay or retry logic helps. i’ve seen this break flows when the volume spikes. just ensure the participant.id is valid before making the call. if it’s missing, the whole flow crashes. check for that first.
Have you tried adding a setParticipant step right after the trigger? The inbound payload is often just a reference, not the full object. In NICE CXone, custom data sticks to the session immediately, but Genesys needs that explicit update to hydrate the attributes for the rest of the flow.
Note: check the data action logs to confirm the payload is actually arriving before the fetch.
the issue isn’t the API itself, it’s how Architect hydrates the context object at the start of the flow. the inbound message trigger only passes a subset of fields to keep the payload light. if you try to drill into participant.attributes immediately, you’re hitting an empty object because the full participant record hasn’t been fetched yet.
i confirmed this by adding a debug step right after the trigger. the participant.id is there, but participant.attributes is null.
you need to force a refresh. add a getData step to fetch the full participant resource before trying to read your custom attributes. here is the exact configuration that works:
{
"steps": [
{
"name": "RefreshParticipant",
"type": "getData",
"url": "/api/v2/conversations/webmessaging/{conversation.id}/participants/{participant.id}",
"resultName": "fullParticipant"
},
{
"name": "ExtractCustomData",
"type": "setVariable",
"variableName": "myCustomValue",
"value": "{{fullParticipant.result.attributes.custom.myKey}}"
}
]
}
make sure you use the result property from the getData step. the fullParticipant object contains the actual response body. once you pull the data this way, the attributes are populated correctly.