# Manage online bookings with Gmail and Google Calendar: n8n workflow

> Started by another system calling it, and works across Gmail, Google Calendar and Slack. 26 steps, 3 branches: large, and worth reading before you trust it...

Source: https://millionrounds.com/workflow/manage-online-bookings-with-gmail-and-google-calendar (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)

# Manage online bookings with Gmail and Google Calendar

Started by another system calling it, and works across Gmail, Google Calendar and Slack. 26 steps, 3 branches: large, and worth reading before you trust it with anything live.

Large

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fmanage-online-bookings-with-gmail-and-google-calendar)

**26 steps** Large: read it before trusting it with anything live

**3** Branches: places the flow splits

**0** Loops or waits

**3** Services it connects to

## The flow

Starts it 6 Logic 12 Service 8

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

- 1 **Webhook - New Booking** Webhook *Starts it*
- 2 **Slack - Notify Team** Slack *Service*
- 3 **Error Trigger** Error trigger *Starts it*
- 4 **Validate Booking** Code *Logic*
- 5 **Prepare Audit Entry** Code *Logic*
- 6 **Format Error** Code *Logic*
- 7 **IF - Valid Request** If *Logic*
- 8 **API - Log Audit** Http Request *Service*
- 9 **Slack - Error Alert** Slack *Service*
- 10 **API - Check Duplicates** Http Request *Service*
- 11 **Format Validation Error** Code *Logic*
- 12 **Format Success** Code *Logic*
- 13 **IF - Not Duplicate** If *Logic*
- 14 **Respond - Validation Error** Respond To Webhook *Starts it*
- 15 **Respond - Success** Respond To Webhook *Starts it*
- 16 **API - Check Availability** Http Request *Service*
- 17 **Format Duplicate Error** Code *Logic*
- 18 **IF - Available** If *Logic*
- 19 **Respond - Duplicate** Respond To Webhook *Starts it*
- 20 **API - Create Booking** Http Request *Service*
- 21 **Format Unavailable** Code *Logic*
- 22 **Format Email** Code *Logic*
- 23 **Respond - Unavailable** Respond To Webhook *Starts it*
- 24 **Send Confirmation Email** Gmail *Service*
- 25 **Prepare Calendar Event** Code *Logic*
- 26 **Create Calendar Event** Google Calendar *Service*

## How it's built

- **Starts on:** Another system calling it
- **Steps:** 26, with 3 branches
- **Size:** Large: read it before trusting it with anything live
- **Connects to:** Gmail, Google Calendar, Slack
- **Model:** None. This is plumbing, not judgement

## Questions

What does it need to run?

An n8n account, plus your own Gmail, Google Calendar and Slack accounts. You connect your own accounts after importing it; none are included.

What starts it?

It starts on another system calling it.

Does it use AI?

No. Every step is fixed logic or a call to a service, so it does the same thing every time.

How long does it take to set up?

Take your time. At 26 steps it is large: read it before trusting it with anything live.

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 26 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%2Fmanage-online-bookings-with-gmail-and-google-calendar)
- **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.

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

## Workflows like it

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

- [**Orchestrate Full-Lifecycle Event Operations** 26 steps · Gmail, Google Calendar](https://millionrounds.com/workflow/orchestrate-full-lifecycle-event-operations)
- [**Categorize emails, chat with PDFs and OpenAI** 26 steps · calls a model · Gmail, Pinecone](https://millionrounds.com/workflow/categorize-emails-chat-with-pdfs-and-openai)
- [**Create ClickUp meeting action items from transcripts** 26 steps · calls a model · Airtable, ClickUp](https://millionrounds.com/workflow/create-clickup-meeting-action-items-from-transcripts)
- [**Manage dental patient chat, bookings, and reminders** 26 steps · calls a model · Google Sheets, Slack](https://millionrounds.com/workflow/manage-dental-patient-chat-bookings-and-reminders)
- [**Prep meeting agendas from Google Calendar with Gmail** 26 steps · calls a model · Airtable, Gmail](https://millionrounds.com/workflow/prep-meeting-agendas-from-google-calendar-with-gmail)
- [**WhatsApp assistant with Gemini and Evolution API** 26 steps · calls a model · Google Calendar](https://millionrounds.com/workflow/whatsapp-assistant-with-gemini-and-evolution-api)