n8n Telegram AI Agent: Gemini QA + Sheets Chat Logging

Answer prospects in Telegram with an AI that’s grounded in your knowledge—and logs every conversation to Google Sheets

This n8n workflow turns your Telegram bot into a Google Gemini-powered “QA + scheduling” assistant. It answers questions using a Supabase vector knowledge base, can run PageSpeed Insights audits on request, tracks lead status in Google Sheets, and books meetings in Google Calendar—with optional human escalation via Telegram.

What this workflow does

• Receives Telegram messages via an n8n Telegram Trigger whenever a prospect sends a new chat.
• Creates a session context (chat ID, username, first name, and channel) and passes it to a Google Gemini-based AI agent with conversation memory.
• Responds to factual questions with grounded answers by querying a Supabase vector knowledge base using Gemini embeddings.
• Performs website audits on demand: if the prospect explicitly requests an audit, the agent calls Google PageSpeed Insights for the provided URL and summarizes the results.
• Logs substantial exchanges to a Google Sheets tracker (recording/updating prospect status and need summary).
• Books qualified calls automatically: when a prospect is qualified, the workflow checks availability in Google Calendar and creates a meeting slot.
• Escalates to a human when needed by notifying Eyitola via Telegram if escalation criteria are met.
• Sends the AI reply back in Telegram so the prospect stays in the same conversation channel.

Use cases

• SaaS operators using n8n to handle inbound Telegram leads with AI QA and instant responses.
• Teams that want Google Sheets lead tracking and Google Calendar booking from chat.
• Prospect-facing workflows that request PageSpeed Insights audits and want AI summaries delivered immediately.

Technical details

• n8n nodes/tools: Telegram Trigger, Telegram, Telegram Tool, n8n-nodes-langchainagent, HTTP Request Tool.
• AI: Google Gemini (PaLM) for chat model and Gemini embeddings.
• Knowledge grounding: Supabase vector store.
• Audits: Google PageSpeed Insights via HTTP requests.
• Tracking & scheduling: Google Sheets and Google Calendar.