Automation library · Scheduling

Send appointment reminders from Google Sheets with Gmail

Started by a clock, and works across Gmail, Google Sheets and Slack. 17 steps, 1 branch: a working afternoon to understand properly.

Medium

17 stepsMedium: a working afternoon
1Branch: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 3Logic 6Service 8

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

  1. 1Every Morning at 9Schedule triggerStarts it
  2. 2Two Hour Reminder CheckSchedule triggerStarts it
  3. 3Workflow Error TriggerError triggerStarts it
  4. 4Get AppointmentsGoogle SheetsService
  5. 5Get Today AppointmentsGoogle SheetsService
  6. 6Alert Front Desk on Workflow FailureSlackService
  7. 7Filter For TomorrowCodeLogic
  8. 8Filter Next Two HoursCodeLogic
  9. 9Filter Out CancelledCodeLogic
  10. 10Send Final ReminderGmailService
  11. 11Has Valid EmailIfLogic
  12. 12Build SummaryCodeLogic
  13. 13Send Reminder EmailGmailService
  14. 14Flag Missing Contact InfoSetLogic
  15. 15Front Desk SummarySlackService
  16. 16Mark As RemindedGoogle SheetsService
  17. 17Alert Front Desk Missing InfoSlackService

How it's built

Starts on
A clock
Steps
17, with 1 branch
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 a clock.

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. 17 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 17 steps before you point it at anything that matters.