Turn Missed Calls into Booked Consults: Voice Agent with Twilio + Realtime API + Calendly

Jordan lost an $8,000 project because his phone went to voicemail while he was in deep work. By December, he had built a Twilio voice AI agent that picks up every call, qualifies leads with natural conversation, and books consultations directly into Calendly. No receptionist, no VA—just a Node server, OpenAI's Realtime API, and about six hours of build time. This episode walks through the complete implementation: Twilio Media Streams setup, bidirectional audio handling, the critical barge-in pattern that makes interruptions feel natural, Calendly API integration for seamless booking, compliance requirements for call recording, and essential guardrails like DTMF fallbacks and human handoff options. Jordan covers the technical gotchas, latency considerations, and post-call automation that creates Notion summaries and follow-up workflows. Perfect for solo consultants who need to capture every lead without breaking focus on client work.