You can have a Vapi agent answer every inbound call, ask qualifying questions, and hand the prospect off to Calendly to lock in a meeting - all without writing a single line of custom telephony code. The result is a self-contained voice AI agent that routes calls, captures lead data, and books calendar slots automatically.
voice is the audible sound produced by a human speaker that can be captured, transmitted, and synthesized by software.
voice AI agent is a software component that receives spoken input over a phone line, runs speech-to-text, applies a language model, and returns synthesized speech to the caller.
Below you'll find everything you need to reproduce the exact workflow, from the required services to the n8n JSON that creates the Vapi agent, plus the pitfalls that usually bite new builders.
What you need
