Automation library · Money admin

AI invoice and receipt data extractor with OpenAI

Started by another system calling it, and works across Google Sheets. It hands the judgement calls to OpenAI. 17 steps, 3 branches: a working afternoon to understand properly.

MediumCalls a model: OpenAI

Download free
17 stepsMedium: a working afternoon
3Branches: places the flow splits
0Loops or waits
1Service it connects to

The flow

Starts it 4Model 6Logic 6Service 1

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

  1. 1Receive InvoiceWebhookStarts it
  2. 2OpenAI Model (Vision)Lm Chat Open AiModel
  3. 3OpenAI Model (Text)Lm Chat Open AiModel
  4. 4Invoice Schema (Image)Output Parser StructuredModel
  5. 5Invoice Schema (Text)Output Parser StructuredModel
  6. 6Extract InputSetLogic
  7. 7Extract from ImageAgentModel
  8. 8Extract from TextAgentModel
  9. 9Has Content?IfLogic
  10. 10Normalize (Image)SetLogic
  11. 11Normalize (Text)SetLogic
  12. 12Image or Text?IfLogic
  13. 13Respond (No Content)Respond To WebhookStarts it
  14. 14Extraction Valid?IfLogic
  15. 15Log to Google SheetsGoogle SheetsService
  16. 16Respond (Extraction Failed)Respond To WebhookStarts it
  17. 17Respond (Success)Respond To WebhookStarts it

How it's built

Starts on
Another system calling it
Steps
17, with 3 branches
Size
Medium: a working afternoon
Connects to
Google Sheets
Model
OpenAI

Questions

What does it need to run?

An n8n account, plus your own Google Sheets account, and a key for OpenAI. 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?

Yes. It calls OpenAI. 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.