Node.js voice agent with AssemblyAI's Voice Agent API

📰 Dev.to · Mart Schweiger

Build a real-time voice agent in Node.js using AssemblyAI's Voice Agent API and WebSocket, handling speech recognition, language model, and text-to-speech server-side

intermediate Published 7 May 2026
Action Steps
  1. Create an account on AssemblyAI to obtain an API key
  2. Set up a new Node.js project and install required dependencies
  3. Establish a WebSocket connection to the AssemblyAI Voice Agent API
  4. Stream microphone input to the API for speech recognition
  5. Handle API responses and generate text-to-speech output
Who Needs to Know This

Developers and engineers building conversational interfaces can benefit from this API to streamline their workflow and create more efficient voice agents

Key Insight

💡 The AssemblyAI Voice Agent API handles the entire conversational pipeline server-side, making it easier to build voice agents

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🗣️ Build a real-time voice agent in Node.js with @AssemblyAI's Voice Agent API! 💻

Key Takeaways

Build a real-time voice agent in Node.js using AssemblyAI's Voice Agent API and WebSocket, handling speech recognition, language model, and text-to-speech server-side

Full Article

Build a real-time voice agent in Node.js with one WebSocket and one API key. The AssemblyAI Voice Agent API handles the entire conversational pipeline — speech recognition, the language model, and text-to-speech — server-side. You stream mi
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