# Manage gym check-ins and subscriptions with Supabase: n8n workflow

> Started by another system calling it, and works across Supabase. 22 steps, 4 branches: large, and worth reading before you trust it with anything live.

Source: https://millionrounds.com/workflow/manage-gym-check-ins-and-subscriptions-with-supabase (Millionrounds; every figure on the page links to its filing or article)

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

# Manage gym check-ins and subscriptions with Supabase

Started by another system calling it, and works across Supabase. 22 steps, 4 branches: large, and worth reading before you trust it with anything live.

Large

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fmanage-gym-check-ins-and-subscriptions-with-supabase)

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

**4** Branches: places the flow splits

**0** Loops or waits

**1** Service it connects to

## The flow

Starts it 10 Logic 6 Service 6

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

- 1 **When Gym Checkin POSTed** Webhook *Starts it*
- 2 **When QR Requested for Gym** Webhook *Starts it*
- 3 **When Account Created** Webhook *Starts it*
- 4 **When QR Requested for Signup** Webhook *Starts it*
- 5 **If Entry ID Provided** If *Logic*
- 6 **Generate Gym Checkin QR** Barcode Scanner *Service*
- 7 **Update Account Status** Supabase *Service*
- 8 **Generate Signup QR** Barcode Scanner *Service*
- 9 **Fetch Entry Details** Supabase *Service*
- 10 **Respond with Gym QR** Respond To Webhook *Starts it*
- 11 **Respond with Signup QR** Respond To Webhook *Starts it*
- 12 **If Entry ID Empty** If *Logic*
- 13 **Set User ID** Set *Logic*
- 14 **Respond Missing Entry ID** Respond To Webhook *Starts it*
- 15 **Fetch User Data** Supabase *Service*
- 16 **Validate Checkin Data** Code *Logic*
- 17 **Log Checkin in Sheets** Supabase *Service*
- 18 **If Validation Passed** If *Logic*
- 19 **If Checkin Validated** If *Logic*
- 20 **Respond Success Full** Respond To Webhook *Starts it*
- 21 **Respond to Checkin Request** Respond To Webhook *Starts it*
- 22 **Respond Error Invalid** Respond To Webhook *Starts it*

## How it's built

- **Starts on:** Another system calling it
- **Steps:** 22, with 4 branches
- **Size:** Large: read it before trusting it with anything live
- **Connects to:** Supabase
- **Model:** None. This is plumbing, not judgement

## Questions

What does it need to run?

An n8n account, plus your own Supabase account. 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 22 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 22 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-gym-check-ins-and-subscriptions-with-supabase)
- **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.

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

## Workflows like it

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

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- [**AI financial assistant for WhatsApp with Supabase** 19 steps · calls a model · Supabase](https://millionrounds.com/workflow/ai-financial-assistant-for-whatsapp-with-supabase)
- [**Sync a Telegram RAG chatbot with Google Drive and OpenAI** 25 steps · calls a model · Google Drive, Supabase](https://millionrounds.com/workflow/sync-a-telegram-rag-chatbot-with-google-drive-and-openai)
- [**Collect historical price data** 18 steps · Supabase, n8n data table](https://millionrounds.com/workflow/collect-historical-price-data)