# Send low-stock purchase orders with Google Sheets and Slack: n8n workflow

> Started by a clock, and works across Google Sheets and Slack. It hands the judgement calls to OpenAI.

Source: https://millionrounds.com/workflow/send-low-stock-purchase-orders-with-google-sheets-and-slack (Millionrounds; every figure on the page links to its filing or article)

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

# Send low-stock purchase orders with Google Sheets and Slack

Started by a clock, and works across Google Sheets and Slack. It hands the judgement calls to OpenAI. 16 steps, 2 branches, 1 loop or waits: a working afternoon to understand properly.

Medium Calls a model: OpenAI

[Download free](https://millionrounds.com/login?next=%2Fapp%2Fworkflow%2Fsend-low-stock-purchase-orders-with-google-sheets-and-slack)

**16 steps** Medium: a working afternoon

**2** Branches: places the flow splits

**1** Loop or waits

**2** Services it connects to

## The flow

Starts it 3 Model 2 Logic 4 Service 7

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

- 1 **OpenAI, PO Model** Lm Chat Open Ai *Model*
- 2 **Error Trigger** Error trigger *Starts it*
- 3 **Manual Trigger** Manual trigger *Starts it*
- 4 **Check Every 4 Hours** Schedule trigger *Starts it*
- 5 **Generate PO Message** Agent *Model*
- 6 **🚨 Slack Error Alert** Slack *Service*
- 7 **Get Active Products** Google Sheets *Service*
- 8 **Slack, Send Purchase Order** Slack *Service*
- 9 **Process One Product at a Time** Split In Batches *Logic*
- 10 **Update Inventory, Reorder Triggered** Google Sheets *Service*
- 11 **Slack, Summary Report** Slack *Service*
- 12 **Calculate Stock Level & Urgency** Code *Logic*
- 13 **Log to Reorder Log Sheet** Google Sheets *Service*
- 14 **Update Last Checked Date** Google Sheets *Service*
- 15 **Needs Reorder?** If *Logic*
- 16 **Already Reordered Today?** If *Logic*

## How it's built

- **Starts on:** A clock
- **Steps:** 16, with 2 branches, 1 loop or waits
- **Size:** Medium: a working afternoon
- **Connects to:** Google Sheets, Slack
- **Model:** OpenAI

## Questions

What does it need to run?

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

What starts it?

It starts on a clock.

Does it use AI?

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

How long does it take to set up?

Plan an afternoon. 16 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 16 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-low-stock-purchase-orders-with-google-sheets-and-slack)
- **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 Sheets](https://millionrounds.com/workflows?service=Google+Sheets#library)[Slack](https://millionrounds.com/workflows?service=Slack#library)

## Workflows like it

Also e-commerce, with the same services where possible, closest in size first.

- [**Automate WhatsApp orders & inventory with Gemini** 16 steps · calls a model · Google Sheets, WhatsApp](https://millionrounds.com/workflow/automate-whatsapp-orders-and-inventory-with-gemini)
- [**Handle order tracking and FAQ requests with Telegram** 16 steps · calls a model · Google Sheets, Telegram](https://millionrounds.com/workflow/handle-order-tracking-and-faq-requests-with-telegram)
- [**Analyze WooCommerce category sales over time with Airtable** 16 steps · Airtable, Slack](https://millionrounds.com/workflow/analyze-woocommerce-category-sales-over-time-with-airtable)
- [**Google Sheets Shopify Product Automation with Gmail** 16 steps · Gmail, Google Sheets](https://millionrounds.com/workflow/google-sheets-shopify-product-automation-with-gmail)
- [**Import products from Google Sheets to Shopify** 16 steps · Google Sheets](https://millionrounds.com/workflow/import-products-from-google-sheets-to-shopify)
- [**Scrape & import shoe products to Shopify with BrowserAct** 16 steps · Google Sheets, Shopify](https://millionrounds.com/workflow/scrape-and-import-shoe-products-to-shopify-with-browseract)