Automation library · Money admin

Automated invoice-PO matching with Gemini

Started by an event in a connected app, and works across Google Drive, Google Sheets and Outlook. It hands the judgement calls to Gemini. 14 steps, 2 branches: a working afternoon to understand properly.

MediumCalls a model: Gemini

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14 stepsMedium: a working afternoon
2Branches: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 1Model 5Logic 2Service 6

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

  1. 1Google Drive TriggerGoogle Drive triggerStarts it
  2. 2Google Gemini Chat ModelLm Chat Google GeminiModel
  3. 3Google Gemini Chat Model1Lm Chat Google GeminiModel
  4. 4PO_DBGoogle Sheets ToolService
  5. 5Update_RowGoogle Sheets ToolService
  6. 6Structured Output ParserOutput Parser StructuredModel
  7. 7Download fileGoogle DriveService
  8. 8Information ExtractorInformation ExtractorModel
  9. 9AI AgentAgentModel
  10. 10Extract from FileExtract From FileService
  11. 11SwitchSwitchLogic
  12. 12IfIfLogic
  13. 13Append row in sheetGoogle SheetsService
  14. 14Send a messageMicrosoft OutlookService

How it's built

Starts on
An event in a connected app
Steps
14, with 2 branches
Size
Medium: a working afternoon
Connects to
Google Drive, Google Sheets, Outlook
Model
Gemini

Questions

What does it need to run?

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

What starts it?

It starts on an event in a connected app.

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. 14 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 14 steps before you point it at anything that matters.