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How to Connect Retell AI Voice Agents to n8n Using Two Webhooks

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A developer who builds AI voice agents for US clients has shared a production-ready integration method linking Retell, a conversational AI platform, with the workflow automation tool n8n. The setup relies on just two webhook directions: Retell notifying n8n about call lifecycle events, and n8n instructing Retell to perform actions like placing outbound calls or fetching transcripts. Business logic such as CRM updates, calendar checks, and lead tagging is kept entirely within n8n rather than embedded in the voice prompt, making the voice layer easier to swap or A/B test. Mid-call custom functions allow the agent to query external services like Google Calendar in real time and speak the results back to the caller, though latency must be kept minimal to avoid dead air. The author warns that cramming automation logic into the voice prompt works in demos but typically breaks under real production conditions.

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How to Connect Retell AI Voice Agents to n8n Using Two Webhooks · ShortSingh