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Client FAQ Bot with RAG using Google Drive PDFs & Azure GPT-4o-mini

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Created by: Rahul Joshi || rahul08

Rahul Joshi

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Last update 2 days ago

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Description:

Build your own AI-powered Client FAQ system with Retrieval-Augmented Generation (RAG) — fully automated using n8n, Google Drive, and Azure OpenAI (GPT-4o-mini). This no-code automation enables your clients or team to ask questions through a webhook, and get precise answers sourced directly from a collection of PDF documents stored in Google Drive.
Ideal for support teams, sales enablement, onboarding automation, and customer self-service — this RAG-powered bot ensures accurate, document-based answers with no hallucinations or AI guesses.

What This Template Does (Step-by-Step):

🌐 Webhook Trigger for Incoming Questions

  • Accepts POST requests with a client’s question
  • Triggers the entire FAQ automation on request

🗂️ Search Google Drive Folder for Source Documents

  • Connects to a specific Google Drive folder (e.g., “Case Studies”)
  • Fetches all PDFs to be used as the context source

📥 Downloads and Processes Each File

  • Downloads all matched files
  • Extracts clean text from each PDF file

🔄 Iterates Over Each File for Text Extraction

  • Loops through multiple files
  • Extracts relevant content from each file individually

🧠 Prepares Clean Context + Question for RAG

  • Combines the extracted PDF text into a single context block
  • Injects the user’s question into the RAG-ready prompt

💬 Azure OpenAI (GPT-4o-mini) RAG Prompt

  • Generates an accurate answer ONLY from the extracted documents
  • If the answer isn’t found, returns a fallback response

📤 Sends the Final Response Back via Webhook

  • Returns the AI-generated answer directly to the client via HTTP response

Perfect For:

📞 Sales & client onboarding teams
📚 Knowledge base & internal SOP support
🧑‍💻 B2B SaaS customer success teams
🏢 Enterprises automating policy or document queries
💼 Agencies offering client-specific documentation portals

Built With:

  • Webhook Trigger (n8n)
  • Google Drive API (search + download)
  • PDF Text Extractor
  • Loop / Split Batches
  • Azure OpenAI GPT-4o-mini via LangChain LLM
  • Context-safe RAG prompt logic
  • Webhook Response for real-time delivery

Key Benefits:

✅ Fast, context-aware answers from internal PDFs
🔒 No hallucinations — AI only responds using uploaded documents
📎 Works with any internal client folder in Google Drive
💬 Easily embed into any app, bot, or portal via Webhook
🧩 100% modular — extend with email, Slack, CRM, or ticketing tools