Build & Sell Voice AI Websites to Businesses (Gemini 3 + n8n)

Metspa Website & Voice Agent Automation with Retail AI & Google Gemini

Key Concepts:

• Retail AI: A no-code platform for building voice agents and AI automations.
• Google Gemini: An AI model used for website creation via prompt engineering.
• Naden: A workflow automation platform used to trigger actions based on webhooks.
• Webhooks: Automated messages sent from one application to another when something happens.
• GPT Realtime Mini: A low-latency language model optimized for voice applications within Retail AI.
• Cal.com: A scheduling platform integrated with Retail AI for appointment booking.
• Dynamic Variables: Data points (name, email, service requested) passed between systems to personalize interactions.

---

1. Introduction & Demonstration

The video demonstrates a fully automated lead generation and appointment booking system for a med spa ("Marina Glow Metspa"). The system begins with a website created using Google Gemini, triggered a workflow in Naden upon form submission, and culminates in a natural-sounding phone call handled by a voice agent built with Retail AI and powered by GPT Realtime Mini. The presenter initiated the process by submitting a consultation request on the Metspa website, immediately triggering a phone call from “Cindy,” the AI-powered voice agent. The call showcased a realistic conversation, confirming the user’s interest in Botox and successfully scheduling a consultation appointment for the following day at 9:00 a.m.

2. Building the Website with Google Gemini

The Metspa website was created using Google Gemini with a single, comprehensive prompt: “Build a modern premium onepage website from a San Francisco Mets spa called Marine Glow Metspa.” The presenter emphasized the ease of use, highlighting that simply providing this prompt generated the entire website. The website includes a form collecting name, email, phone number, and service interest. Crucially, the prompt instructs Gemini to send all submitted data to Naden via a webhook. The presenter encouraged viewers to screenshot the prompt for replication.

3. Naden Workflow & Webhook Integration

Naden serves as the central automation hub. Upon form submission on the website, a webhook transmits the user’s data (name, email, phone number, service requested) to Naden. Within Naden, a workflow is configured to:

• Trigger Event: Receive data via the webhook.
• HTTP Request Node: Send the received data to the Retail AI voice agent via an API endpoint. The presenter demonstrated copying the Naden webhook URL and pasting it into the Gemini prompt to ensure proper data transmission.
• Google Sheets Update (Optional): Update a Google Sheet with the lead information and a summary of the AI agent’s conversation. This step is optional but provides a CRM-like functionality.

The presenter stressed the importance of replacing the placeholder Naden app URL with the user’s unique URL.

4. Retail AI Voice Agent Configuration

The voice agent, “Cindy,” is built within the Retail AI platform. The core of the agent is a detailed prompt outlining its role, personality, and step-by-step instructions for handling calls. Key elements of the prompt include:

• Role Definition: “You are Cindy, AI powered voice assistant for Marina Glow Met Spa…”
• Goal: “Follow up when people submit consultation forms to confirm their service and help them book an appointment.”
• Step-by-Step Instructions: Detailed scripts for greeting the caller, confirming their interest, checking calendar availability, booking appointments, and confirming contact information.
• Dynamic Variables: The prompt utilizes placeholders (e.g., “name,” “service requested”) that are populated with data received from Naden via the API.

Retail AI’s function integration is a key feature. The agent utilizes two functions:

• Check Availability Calendar: Connects to Cal.com (or Google Calendar) via API to determine appointment availability.
• Book Appointment Calendar: Uses the Cal.com API to schedule appointments.

The presenter demonstrated adding these functions by simply copying and pasting API keys. The prompt instructs the agent when to utilize these functions based on user responses. Finally, the prompt includes an “End Call” function for polite call termination.

5. GPT Realtime Mini & Agent ID

The voice agent is powered by GPT Realtime Mini, praised for its low latency and natural-sounding responses. The presenter highlighted the cost of approximately $0.125 per minute. The “Agent ID” within Retail AI is crucial for connecting the Naden webhook to the correct voice agent. This ID is used in the API endpoint within the Naden HTTP Request node.

6. Real-World Applications & Community Resources

The presenter emphasized the commercial viability of this automation, suggesting it could be sold to med spas and other businesses. He highlighted success stories from his community:

• Isaac: Closed his first AI automation client with a voice agent.
• Libis: Secured a $22,000 voice AI agent project with a $1,500/month retainer.

He promoted his online community, offering:

• Free Resources: Blueprints, prompts, and Naden templates.
• Voice AI Course: A comprehensive course on Retail AI with certification.
• AI Agency Course: Training on starting and scaling an AI agency.
• Certified Partner Program: Opportunity to be listed on the Retail AI website and receive leads.

7. Conclusion

The video effectively demonstrates a powerful, end-to-end automation solution for lead generation and appointment booking. By combining the website creation capabilities of Google Gemini, the workflow automation of Naden, and the conversational AI of Retail AI powered by GPT Realtime Mini, businesses can significantly streamline their operations and improve customer engagement. The presenter’s emphasis on readily available resources and community support further empowers viewers to replicate and monetize this solution. The key takeaway is the potential to leverage no-code AI tools to create valuable services for businesses and build a successful AI-focused venture.