Build a Voice Agent in an Hour with Claude Code | AssemblyAI Workshop

In this live workshop, AssemblyAI Product Manager Dan Ince builds a fully working appointment booking voice agent from scratch, using only the AssemblyAI Voice Agent API and Claude Code. No pre-written code, custom tools or MCP servers. Just a docs URL and a few prompts. By the end, you'll have a working voice agent with a frontend UI, tool calling, and a deployment you can share with anyone. What you'll walk away with: -A working voice agent app you can run locally or deploy to Railway -The exact Claude Code prompts used to scaffold backend, frontend, and tool calling -A reusable architecture pattern (Python backend for token auth + HTML frontend) that keeps your API key off the client -Techniques for appointment booking, tool chaining, and progressive tool reveal -Practical tips on turn detection, echo cancellation, and reducing latency -Answers from the most popular building FAQs What you'll need: 🔑 A free AssemblyAI API key: https://www.assemblyai.com/products/voice-agent-api?utm_source=youtube&utm_medium=referral&utm_campaign=workshop&utm_content=claude_voice_agent 🤖 Claude Code (VS Code plugin or the Claude app) 🖥️ Docs link to drop in Claude Code: https://www.assemblyai.com/docs/voice-agents/voice-agent-api ⏱ Jump to the build: 11:39 — Live build starts: blank project in VS Code 13:35 — Prompt 1: Scaffold Python backend + HTML frontend with token auth 18:31 — Running the app locally for the first time 24:51 — First working voice agent in the browser 29:02 — Prompt 2: Add appointment booking tool call 35:40 — Prompt 3: UI redesign (car mechanic booking agent) 43:13 — Final live demo: voice agent handles a full MOT booking 45:20 — Progressive tool reveal: how to eliminate tool-calling hallucinations 47:18 — Turn detection tuning + echo cancellation tips 54:00 — Deploying to Railway and generating a shareable URL The full code is on GitHub: https://github.com/dan-ince-aai/apex-auto-voice-agent ▬▬▬▬▬▬▬▬▬▬▬▬ CONNECT ▬▬▬▬▬▬▬▬▬▬▬▬ 🖥️ Website: https:/