# Run a Telegram voice assistant with OpenAI and Google Calendar: n8n workflow

> Started by an incoming Telegram message, and works across Google Calendar and Telegram. It puts OpenAI behind a retrieval step, so answers are drawn from...

Source: https://millionrounds.com/workflow/run-a-telegram-voice-assistant-with-openai-and-google-calend (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Scheduling](https://millionrounds.com/workflows?category=Scheduling#library)

# Run a Telegram voice assistant with OpenAI and Google Calendar

Started by an incoming Telegram message, and works across Google Calendar and Telegram. It puts OpenAI behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 14 steps, 1 branch: a working afternoon to understand properly.

Medium Calls a model: OpenAI Retrieval

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Frun-a-telegram-voice-assistant-with-openai-and-google-calend)

**14 steps** Medium: a working afternoon

**1** Branch: places the flow splits

**0** Loops or waits

**2** Services it connects to

## The flow

Starts it 1 Model 5 Logic 4 Service 4

The steps in the order they run, from what starts it.

- 1 **When Telegram Message Received** Telegram trigger *Starts it*
- 2 **OpenAI GPT-5 Mini Model** Lm Chat Open Ai *Model*
- 3 **Manage Conversation History** Memory Buffer Window *Model*
- 4 **Create Google Calendar Event** Google Calendar Tool *Service*
- 5 **AI Calculator Tool** Tool Calculator *Model*
- 6 **Set Assistant Preferences** Set *Logic*
- 7 **AI Personal Assistant Agent** Agent *Model*
- 8 **Route by Telegram Content Type** Switch *Logic*
- 9 **Send Reply via Telegram API** Telegram *Service*
- 10 **Set Text Message Content** Set *Logic*
- 11 **Fetch Telegram Voice Note** Telegram *Service*
- 12 **Request Text or Voice Message** Telegram *Service*
- 13 **OpenAI Voice Transcriber** Open Ai *Model*
- 14 **Set Transcribed Voice Text** Set *Logic*

## How it's built

- **Starts on:** An incoming Telegram message
- **Steps:** 14, with 1 branch
- **Size:** Medium: a working afternoon
- **Connects to:** Google Calendar, Telegram
- **Model:** OpenAI
- **Retrieval:** Answers are drawn from documents you supply, not from the model alone

## Questions

What does it need to run?

An n8n account, plus your own Google Calendar and Telegram accounts, and a key for OpenAI. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an incoming Telegram message.

Does it use AI?

Yes. It calls OpenAI. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 14 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

**Before you run it**

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 14 steps before you point it at anything that matters.

## Run it in n8n

- **Create your n8n account** Free to start. n8n is where the workflow runs. [Create an n8n account ↗](https://millionrounds.com/n8n)
- **Download the workflow** Free with a Millionrounds account. [Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Frun-a-telegram-voice-assistant-with-openai-and-google-calend)
- **Paste it into n8n** Open a new workflow in n8n and paste. Then connect your own accounts.

Stored with the author's traces removed: canvas notes, instance identifiers, saved credential names and any live document they had left behind.

## Connects to

Each opens the other workflows that use it.

[Google Calendar](https://millionrounds.com/workflows?service=Google+Calendar#library)[Telegram](https://millionrounds.com/workflows?service=Telegram#library)

## Workflows like it

Also scheduling, with the same services where possible, closest in size first.

- [**AI-powered Gmail and Calendar assistant with Gemini** 14 steps · calls a model · Gmail, Google Calendar](https://millionrounds.com/workflow/ai-powered-gmail-and-calendar-assistant-with-gemini)
- [**Analyze legal contracts with OpenAI and Slack** 14 steps · calls a model · Email, Google Calendar](https://millionrounds.com/workflow/analyze-legal-contracts-with-openai-and-slack)
- [**Analyze meeting effectiveness with OpenAI and Google Calendar** 14 steps · calls a model · Google Calendar, Slack](https://millionrounds.com/workflow/analyze-meeting-effectiveness-with-openai-and-google-calenda)
- [**Book and manage law office appointments with Telegram** 14 steps · calls a model · Google Calendar, Telegram](https://millionrounds.com/workflow/book-and-manage-law-office-appointments-with-telegram)
- [**Complete lesson automation for modern UK teachers with OpenAI** 14 steps · calls a model · Gmail, Google Calendar](https://millionrounds.com/workflow/complete-lesson-automation-for-modern-uk-teachers-with-opena)
- [**Create consulting client onboarding tasks with OpenAI** 14 steps · calls a model · Email, Google Calendar](https://millionrounds.com/workflow/create-consulting-client-onboarding-tasks-with-openai)