No idea why this is happening, our webhook integrations are failing during the final migration phase. We are moving from Zendesk to Genesys Cloud and trying to map our old ticketing logic to new interaction flows.
Environment: Genesys Cloud EU-West, Zendesk Support Suite. Migration batch #4.
The Goal: Replicate Zendesk’s automatic ticket creation via webhooks. In Zendesk, we used simple JSON payloads to create tickets. Now we are trying to push data into Genesys Cloud Digital Channels using the POST /api/v2/interactions endpoint.
The Error: We are hitting a 400 Bad Request specifically on the channels array structure. The error message says Invalid channel type: 'web'. This is confusing because the documentation clearly lists web as a valid channel type for digital interactions.
Comparison: In Zendesk, we didn’t have to worry about channel types being so rigid. A ticket was just a ticket. Here, the distinction between web, sms, and chat seems to break the API if not formatted exactly right. We tried changing it to webchat but that returned a 422 Unprocessable Entity.
Payload Snippet: We are sending {"channels": [{"type": "web", "externalId": "zd-ticket-123"}]}. The externalId maps to the old Zendesk ticket ID for reference.
Architect Flow: The webhook triggers a flow that should create a new interaction. The flow logs show it receives the payload but fails at the ‘Create Interaction’ block. The debug output shows the JSON is valid, so it must be a schema mismatch in Genesys Cloud.
Timezone Note: We are testing during Paris business hours (CET). Latency isn’t the issue. It is a hard stop error.
Question: Is there a specific version of the API or a different channel type string we should be using for migrated web data? The Zendesk-to-GC migration guide mentions ‘digital channel mapping’ but doesn’t give exact JSON examples for the type field. We are enthusiastic about the platform but stuck on this syntax error. Any help with the correct payload structure would be amazing.
You need to stop treating the webhook payload as a direct 1:1 translation of the Zendesk ticket structure, as Genesys Cloud’s interaction engine expects a specific schema for digital channel events. The 400 Bad Request error usually stems from missing required fields in the metadata object or incorrect formatting of the timestamp field, which must be in ISO 8601 format with timezone offset. While the suggestion above mentions checking the URL, the real issue is often the payload structure itself. In my experience managing cross-platform integrations, the direction field is frequently omitted, causing the backend to reject the request outright. Ensure your JSON payload includes the type set to “message” and the metadata object containing externalId and timestamp. Here is a minimal working example that bypasses the common validation traps:
Additionally, verify that the webhook endpoint in Genesys Cloud is configured to accept POST requests with application/json content type. If you are using a custom flow to process these webhooks, check the data_action node for strict schema validation that might be rejecting payloads with extra fields. The Zendesk migration guide often overlooks the fact that Genesys requires explicit direction flags for routing logic. If the error persists, enable debug logging on the integration node to see the exact field causing the rejection, as the generic 400 error hides the specific validation failure. This approach ensures the data maps correctly to the interaction lifecycle without triggering backend validation errors.
The payload structure needs to align with Genesys Cloud’s interaction schema, not Zendesk’s ticket model. Here is the corrected JSON format that should resolve the 400 error: