Automation library · Alerts and monitoring

Send promo code expiry alerts with Webhook and Google Sheets

Started by another system calling it, and works across Gmail, Google Sheets and Slack. 10 steps, 3 branches: a working afternoon to understand properly.

Medium

10 stepsMedium: a working afternoon
3Branches: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 1Logic 5Service 4

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

  1. 1Receive Promo RequestWebhookStarts it
  2. 2Normalize Promo DataSetLogic
  3. 3Expiry Is ValidIfLogic
  4. 4Send Promo EmailGmailService
  5. 5Save Promo to SheetGoogle SheetsService
  6. 6Calculate Days LeftSetLogic
  7. 7Is Urgent (1 Day Left)IfLogic
  8. 8Slack Urgent AlertSlackService
  9. 9Is Warning (2–3 Days Left)IfLogic
  10. 10Slack Warning AlertSlackService

How it's built

Starts on
Another system calling it
Steps
10, with 3 branches
Size
Medium: a working afternoon
Connects to
Gmail, Google Sheets, Slack
Model
None. This is plumbing, not judgement

Questions

What does it need to run?

An n8n account, plus your own Gmail, Google Sheets 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?

Plan an afternoon. 10 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 10 steps before you point it at anything that matters.