AI Telegram Bot + Google Calendar Automation in n8n

AI Telegram Bot + Google Calendar Automation in n8n
I have created a full no-code system in n8n that allows managing Google Calendar events through messages or voice in Telegram.

Features implemented:
Telegram Trigger — the bot responds to incoming messages or voice.

Text or Audio Parser — automatic recognition: text or audio.

Download + Transcribe — downloading and transcribing voice via OpenAI Whisper.

AI Agent (GPT-4o) — AI processes the request, recognizes the intent (create, update, delete, or view an event).

Window Memory — session memory provides contextual conversation.

Google Calendar (4 actions):

Create event

Update event

Delete event

Get list of events by dates

Telegram Response — AI sends a reply to the user in chat.

Technologies:
n8n (SaaS)

Telegram Bot API

Google Calendar API

OpenAI GPT-4o + Whisper (speech recognition)

Dynamic logic via $fromAI, $now, {{ $json.message.text }}, and others.

Example usage:
User sends a voice message: “Create a meeting tomorrow at 2:00 PM with Alexander,” — the bot recognizes, transcribes, interprets the intent, creates an event in Google Calendar, and sends a confirmation in Telegram.