Anyone running Vapi + n8n? Hitting major issues with Structured Outputs

Hey everyone — looking for some help or confirmation here.

I built an AI cold caller using Vapi, with n8n as the backend (webhooks, call processing, Sheets, follow-ups, etc.). The calling itself works great, but I’m running into a wall with Structured Outputs.

Setup:

Using Vapi’s new Structured Outputs (not deprecated structured data)

6 outputs configured (lead qualification, call outcome, summary, appointment info, etc.)

Outputs show correctly in the Vapi dashboard call logs

Deprecated Summary / Structured Data are disabled

Assistant is patched with artifactPlan.structuredOutputIds

Issue:

When I fetch calls in n8n via:

GET https://api.vapi.ai/call/{callId}

the response does not include artifact or artifact.structuredOutputs — only transcript, recording URL, status, etc., even though the dashboard shows the structured outputs for that same call.

Has anyone successfully pulled Structured Outputs via the API?

Is this a known limitation or bug, or is there a workaround people are using?

This is blocking a production n8n workflow, so any insight would be appreciated.

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