Automation library · Alerts and monitoring

Detect maverick spend and alert reviewers with Slack and Gmail

Started by a clock, and works across Gmail, Google Sheets and Slack. It hands the judgement calls to Gemini. 17 steps, 1 branch, 1 loop or waits: a working afternoon to understand properly.

MediumCalls a model: Gemini

Download free
17 stepsMedium: a working afternoon
1Branch: places the flow splits
1Loop or waits
3Services it connects to

The flow

Starts it 1Model 1Logic 7Service 8

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

  1. 1Daily Compliance ScanSchedule triggerStarts it
  2. 2Get Approved Supplier ListGoogle SheetsService
  3. 3Get Pending TransactionsGoogle SheetsService
  4. 4Clean & Normalize Transaction DataSetLogic
  5. 5Merge Supplier & Transaction DataMergeLogic
  6. 6Detect Maverick Spend (Unapproved Supplier)CodeLogic
  7. 7Check Maverick Spend ConditionIfLogic
  8. 8Generate AI Compliance SuggestionsGoogle GeminiModel
  9. 9Skip Approved Supplier (No Action)SetLogic
  10. 10Format AI Output & Add TimestampCodeLogic
  11. 11Mark Approved Transaction as ProcessedGoogle SheetsService
  12. 12Send Slack Alert (Maverick Spend)SlackService
  13. 13Send Email Alert (Violation Report)GmailService
  14. 14Log Violation in SheetGoogle SheetsService
  15. 15Mark Transaction as ProcessedGoogle SheetsService
  16. 16Wait 2 Hours Before EscalationWaitLogic
  17. 17Send Escalation AlertSlackService

How it's built

Starts on
A clock
Steps
17, with 1 branch, 1 loop or waits
Size
Medium: a working afternoon
Connects to
Gmail, Google Sheets, Slack
Model
Gemini

Questions

What does it need to run?

An n8n account, plus your own Gmail, Google Sheets and Slack accounts, and a key for Gemini. 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 Gemini. Model calls are billed by the provider, not by n8n.

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.