# Send WhatsApp notifications for Cal.com & Calendly bookings: n8n workflow

> Started by an event in a connected app, and works across WhatsApp. It puts Gemini behind a retrieval step, so answers are drawn from documents you supply...

Source: https://millionrounds.com/workflow/send-whatsapp-notifications-for-cal-com-and-calendly-booking (Millionrounds; every figure on the page links to its filing or article)

[Automation library](https://millionrounds.com/workflows) · [Alerts and monitoring](https://millionrounds.com/workflows?category=Alerts+and+monitoring#library)

# Send WhatsApp notifications for Cal.com & Calendly bookings

Started by an event in a connected app, and works across WhatsApp. It puts Gemini behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 7 steps: small enough to read in one sitting and change without fear.

Small Calls a model: Gemini Retrieval

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fsend-whatsapp-notifications-for-cal-com-and-calendly-booking)

**7 steps** Small: readable in one sitting

**0** Branches: places the flow splits

**0** Loops or waits

**1** Service it connects to

## The flow

Starts it 2 Model 3 Logic 1 Service 1

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

- 1 **Google Gemini Chat Model** Lm Chat Google Gemini *Model*
- 2 **Simple Memory** Memory Buffer Window *Model*
- 3 **Cal.com Events** Cal trigger *Starts it*
- 4 **Calendly Events** Calendly trigger *Starts it*
- 5 **Message Generator** Agent *Model*
- 6 **Merge Data** Aggregate *Logic*
- 7 **WhatsApp Notification** Whats App *Service*

## How it's built

- **Starts on:** An event in a connected app
- **Steps:** 7
- **Size:** Small: readable in one sitting
- **Connects to:** WhatsApp
- **Model:** Gemini
- **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 WhatsApp account, and a key for Gemini. You connect your own accounts after importing it; none are included.

What starts it?

It starts on an event in a connected app.

Does it use AI?

Yes. It calls Gemini. 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?

Not long. At 7 steps it can be read in one sitting and changed without fear.

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 7 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%2Fsend-whatsapp-notifications-for-cal-com-and-calendly-booking)
- **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.

[WhatsApp](https://millionrounds.com/workflows?service=WhatsApp#library)

## Workflows like it

Also alerts and monitoring, with the same services where possible, closest in size first.

- [**Automate prescription delivery with Google Sheets and WhatsApp** 7 steps · Email, Google Sheets](https://millionrounds.com/workflow/automate-prescription-delivery-with-google-sheets-and-whatsa)
- [**Insert Notion database fields from a public URL with WhatsApp** 7 steps · Notion, WhatsApp](https://millionrounds.com/workflow/insert-notion-database-fields-from-a-public-url-with-whatsap)
- [**Multi-channel workflow error alerts with Telegram and Gmail** 7 steps · Discord, Gmail](https://millionrounds.com/workflow/multi-channel-workflow-error-alerts-with-telegram-and-gmail)
- [**Onboard new clients from e-sign webhooks with Airtable** 7 steps · Airtable, Gmail](https://millionrounds.com/workflow/onboard-new-clients-from-e-sign-webhooks-with-airtable)
- [**Send WhatsApp bulk messages from Google Sheets** 7 steps · Google Sheets, WhatsApp](https://millionrounds.com/workflow/send-whatsapp-bulk-messages-from-google-sheets)
- [**Send personalized WhatsApp templates triggered by KlickTipp** 7 steps · WhatsApp](https://millionrounds.com/workflow/send-personalized-whatsapp-templates-triggered-by-klicktipp)