Book Appointments with Voice Using VAPI & Cal.com

This template uses VAPI and Cal.com to book appointments through a voice conversation. It detects whether the user wants to check availability or book an appointment, then responds naturally with real-time scheduling options. **Who is this for?** This workflow is perfect for: - Voice assistant developers - AI receptionists and smart concierge tools - Service providers (salons, clinics, coaches) needing hands-free scheduling - Anyone building voice-based customer experiences **What does it do?** This workflow turns a natural voice conversation into a working appointment system. - It starts with a Webhook connected to your VAPI voice agent. - The Set node extracts user intent (like "check availability" or "book now"). - A Switch node branches logic based on the intent. - If the user wants to check availability, the workflow fetches available times from Cal.com. - If the user wants to book, it creates a new event using Cal.com's API. - The final result is sent back to VAPI as a conversational voice response. **How to use it** - Import this workflow into your n8n instance. - Set up a Webhook node and connect it to your VAPI voice agent. - Add your Cal.com API token as a credential (use HTTP Header Auth). - Deploy and test using VAPI's simulator or real phone input. - (Optional) Customize the OpenAI prompt if you're using it to process or moderate inputs. **Requirements** - A working VAPI agent - A Cal.com account with API access - n8n (cloud or self-hosted) - An understanding of how to configure webhook and API credentials in n8n **Customization Ideas** - Swap out Cal.com with another booking API (like Calendly) - Add a Google Sheets or Supabase node to log appointments - Use OpenAI to summarize or sanitize voice inputs before proceeding - Build multi-turn conversations in VAPI for more complex bookings