Descriptions:
This tutorial demonstrates how to build a fully automated voice AI agent using n8n and Retell AI that can autonomously call customers, qualify leads, and handle natural conversation without human involvement. The video opens with a live demo call where an AI agent conducts a professional lead qualification conversation, smoothly handling interruptions and fielding questions about scheduling and budget using OpenAI’s GPT real-time model.
Zubair Trabzada walks through the complete n8n workflow: a web form collects prospect information (name, email, phone, budget as a dropdown, and service description), an HTTP POST request to Retell AI’s API triggers the outbound call, and the agent’s behavior is governed by a configurable system prompt and callable function tools. The video covers how to retrieve a Retell AI API key, set the correct endpoint, and extend the agent with appointment-booking capabilities.
The tutorial is aimed at freelancers and AI agency builders looking to offer voice automation services to businesses. The channel cites community members closing voice AI contracts worth $22,000, positioning this as an accessible entry point for AI service revenue. Tools covered include n8n, Retell AI, and OpenAI’s real-time voice API, with guidance on webhook setup, prompt engineering for the agent persona, and options for selecting different underlying voice models.
📺 Source: Zubair Trabzada | AI Workshop · Published December 04, 2025
🏷️ Format: Hands On Build
