Automation library · Money admin

Extract invoice data from scanned PDFs to Google Sheets

Started by someone submitting a form, and works across Google Sheets. It hands the judgement calls to Gemini. 16 steps, 1 loop or waits: a working afternoon to understand properly.

MediumCalls a model: Gemini

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16 stepsMedium: a working afternoon
0Branches: places the flow splits
1Loop or waits
1Service it connects to

The flow

Starts it 1Model 2Logic 3Service 10

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

  1. 1Google Gemini Chat ModelLm Chat Google GeminiModel
  2. 2Trigger – Invoice upload (PDF)Form triggerStarts it
  3. 3Information ExtractorInformation ExtractorModel
  4. 4Create Sarvam invoice OCR jobHttp RequestService
  5. 5Merge job details with upload URLMergeLogic
  6. 6Append extracted invoice data to Google SheetsGoogle SheetsService
  7. 7Generate Sarvam presigned upload URLHttp RequestService
  8. 8Upload invoice PDF to SarvamHttp RequestService
  9. 9Start Sarvam invoice OCRHttp RequestService
  10. 10Check Sarvam OCR statusHttp RequestService
  11. 11WaitWaitLogic
  12. 12Get OCR ResultHttp RequestService
  13. 13Download Sarvam OCR output ZIPHttp RequestService
  14. 14Decompress OCR result fileCompressionService
  15. 15Extract invoice OCR JSONExtract From FileService
  16. 16Prepare invoice text for LLMCodeLogic

How it's built

Starts on
Someone submitting a form
Steps
16, 1 loop or waits
Size
Medium: a working afternoon
Connects to
Google Sheets
Model
Gemini

Questions

What does it need to run?

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

What starts it?

It starts on someone submitting a form.

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. 16 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 16 steps before you point it at anything that matters.