Build a chatbot, voice and phone agent with Voiceflow, Google Calendar and RAG

Voiceflow is a no-code platform that allows you to design, prototype, and deploy conversational assistants across multiple channels—such as chat, voice, and phone—with advanced logic and natural language understanding. It supports integration with APIs, webhooks, and even tools like Twilio for phone agents. It's perfect for building customer support agents, voice bots, or intelligent assistants.

This workflow connects n8n and Voiceflow with tools like Google Calendar, Qdrant (vector database), OpenAI, and an order tracking API to power a smart, multi-channel conversational agent.


There are 3 main webhook endpoints in n8n that Voiceflow interacts with:

1. n8norder – receives user input related to order tracking, queries an API, and responds with tracking status. 2. n8nappointment – processes appointment booking, reformats date input using OpenAI, and creates a Google Calendar event. 3. n8nrag – handles general product/service questions using a RAG (Retrieval-Augmented Generation) system backed by: - Google Drive document ingestion, - Qdrant vector store for search, - and OpenAI models for context-based answers.

Each webhook is connected to a corresponding "Capture" block inside Voiceflow, which sends data to n8n and waits for the response.

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How It Works This n8n workflow integrates Voiceflow for chatbot/voice interactions, Google Calendar for appointment scheduling, and RAG (Retrieval-Augmented Generation) for knowledge-based responses. Here’s the flow: