Automation library · Money admin

Extract invoice data with Gemini and Google Sheets

Started by an incoming Telegram message, and works across Google Sheets and Telegram. It hands the judgement calls to Gemini. 15 steps, 2 branches: a working afternoon to understand properly.

MediumCalls a model: Gemini

Download free
15 stepsMedium: a working afternoon
2Branches: places the flow splits
0Loops or waits
2Services it connects to

The flow

Starts it 2Model 3Logic 7Service 3

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

  1. 1Upload Invoice FormForm triggerStarts it
  2. 2Telegram TriggerTelegram triggerStarts it
  3. 3Prepare Invoice InputCodeLogic
  4. 4File Is Processable?IfLogic
  5. 5Upload a media fileGoogle GeminiModel
  6. 6Build Invalid File ResultCodeLogic
  7. 7IfIfLogic
  8. 8Send Telegram Rejection1TelegramService
  9. 9Analyze documentGoogle GeminiModel
  10. 10Analyze an imageGoogle GeminiModel
  11. 11Normalize and ValidateCodeLogic
  12. 12Split OutSplit OutLogic
  13. 13Append Invoice to Google SheetsGoogle SheetsService
  14. 14Build Success FileCodeLogic
  15. 15Send Telegram Notification1TelegramService

How it's built

Starts on
An incoming Telegram message
Steps
15, with 2 branches
Size
Medium: a working afternoon
Connects to
Google Sheets, Telegram
Model
Gemini

Questions

What does it need to run?

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

What starts it?

It starts on an incoming Telegram message.

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. 15 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 15 steps before you point it at anything that matters.