Negative Sentiment Alerts: n8n + OpenAI + Telegram Webhook

Catch Negative Customer Feedback Instantly (n8n + OpenAI + Telegram)

This n8n workflow automatically receives customer feedback via a webhook, records it in Google Sheets, uses OpenAI (GPT-4o-mini) to classify sentiment and summarize the message, and then sends a Telegram alert only when the sentiment is negative.

What this workflow does

• Receives feedback through a webhook endpoint using a POST request.
• Normalizes the payload into consistent fields: name, email, rating, message, source, and adds a received timestamp.
• Logs to Google Sheets by appending the normalized feedback into the “Feedback” worksheet (required columns include received_at, name, email, rating, source, message, sentiment, category, summary).
• Analyzes with OpenAI by sending the feedback to GPT-4o-mini to return JSON containing sentiment, category, summary, and suggested action.
• Triggers a Telegram alert when sentiment is negative, sending a formatted message to your Telegram chat.

Use cases

• Alert your team when customers report dissatisfaction so you can respond faster.
• Monitor feedback from a website form or app and automatically capture context in Google Sheets for later review.
• Use AI sentiment classification to reduce manual triage and surface the most urgent issues via Telegram.

Technical details

• Webhook: webhook consumer endpoint to ingest feedback.
• Google Sheets: OAuth credential + spreadsheet ID 1uw7UaNuorGIbgEtPSANNT8SdiS6qnnArvJVwbfrMpi4, worksheet Feedback.
• OpenAI: GPT-4o-mini via OpenAI API node, extracting sentiment/category/summary from JSON.
• Telegram: sends alerts to chat ID 7040749953 when sentiment is negative.
• Logic nodes: if, set, plus workflow notes/sticky note for setup clarity.