# Book, reschedule and confirm WhatsApp appointments with Claude: n8n workflow

> Started by another system calling it. It calls services over plain HTTP rather than through connectors. It hands the judgement calls to Claude.

Source: https://millionrounds.com/workflow/book-reschedule-and-confirm-whatsapp-appointments-with-claud (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)

# Book, reschedule and confirm WhatsApp appointments with Claude

Started by another system calling it. It calls services over plain HTTP rather than through connectors. It hands the judgement calls to Claude. 25 steps, 2 loops or waits: large, and worth reading before you trust it with anything live.

Large Calls a model: Claude

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fbook-reschedule-and-confirm-whatsapp-appointments-with-claud)

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

**0** Branches: places the flow splits

**2** Loops or waits

**0** Services by connector: it calls them over plain HTTP

## The flow

Starts it 4 Model 2 Logic 14 Service 5

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

- 1 **Webhook - WhatsApp Inbound** Webhook *Starts it*
- 2 **Webhook - WhatsApp Verify** Webhook *Starts it*
- 3 **Anthropic Claude Model** Lm Chat Anthropic *Model*
- 4 **Prepare Message Context** Set *Logic*
- 5 **Respond Verify Challenge** Respond To Webhook *Starts it*
- 6 **AI - Detect Intent and Parse** Agent *Model*
- 7 **Wait For Data** Wait *Logic*
- 8 **JS - Parse AI Output** Code *Logic*
- 9 **Filter Valid Messages** Filter *Logic*
- 10 **Route - Book** Filter *Logic*
- 11 **Route - Reschedule** Filter *Logic*
- 12 **Route - Confirm** Filter *Logic*
- 13 **Route - Unknown** Filter *Logic*
- 14 **JS - Validate Book Slot** Code *Logic*
- 15 **JS - Validate Reschedule Slot** Code *Logic*
- 16 **JS - Validate Confirm Ref** Code *Logic*
- 17 **JS - Handle Unknown Intent** Code *Logic*
- 18 **Sheets - Create Appointment** Http Request *Service*
- 19 **Sheets - Update Reschedule** Http Request *Service*
- 20 **Sheets - Confirm Appointment** Http Request *Service*
- 21 **JS - Build Reply Message** Code *Logic*
- 22 **Wait - Rate Limit Buffer** Wait *Logic*
- 23 **Send WhatsApp Reply** Http Request *Service*
- 24 **Log to Activity Sheet** Http Request *Service*
- 25 **Respond to WhatsApp 200 OK** Respond To Webhook *Starts it*

## How it's built

- **Starts on:** Another system calling it
- **Steps:** 25, 2 loops or waits
- **Size:** Large: read it before trusting it with anything live
- **Connects to:** Nothing by connector; it calls services over plain HTTP
- **Model:** Claude

## Questions

What does it need to run?

An n8n account, and a key for Claude. 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?

Yes. It calls Claude. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Take your time. At 25 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 25 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%2Fbook-reschedule-and-confirm-whatsapp-appointments-with-claud)
- **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.

## Workflows like it

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

- [**AI token tracker for WhatsApp & Telegram – Save AI usage** 25 steps · calls a model · Airtable, Gmail](https://millionrounds.com/workflow/ai-token-tracker-for-whatsapp-and-telegram-save-ai-usage)
- [**AI-powered meeting research & daily agenda** 25 steps · calls a model · Gmail, Google Calendar](https://millionrounds.com/workflow/ai-powered-meeting-research-and-daily-agenda)
- [**Automate new customer onboarding with HubSpot** 25 steps · calls a model · Gmail, Google Calendar](https://millionrounds.com/workflow/automate-new-customer-onboarding-with-hubspot)
- [**Automated YouTube video scheduling & AI metadata generation** 25 steps · calls a model · YouTube](https://millionrounds.com/workflow/automated-youtube-video-scheduling-and-ai-metadata-generatio)
- [**Automated customer onboarding with HubSpot and Gmail** 25 steps · calls a model · Gmail, Google Calendar](https://millionrounds.com/workflow/automated-customer-onboarding-with-hubspot-and-gmail)
- [**Hotel review scraper from booking, expedia, and tripadvisor** 25 steps · calls a model · NocoDB](https://millionrounds.com/workflow/hotel-review-scraper-from-booking-expedia-and-tripadvisor)