Automation library · Money admin

Extract invoice fields from Google Drive to Sheets with Ollama

Started by an event in a connected app, and works across Google Drive and Google Sheets. It hands the judgement calls to a local model. 13 steps: a working afternoon to understand properly.

MediumCalls a model: a local model

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

The flow

Starts it 1Model 2Logic 4Service 6

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

  1. 1Watch Google Drive FolderGoogle Drive triggerStarts it
  2. 2Local Ollama LLM ModelLm Chat OllamaModel
  3. 3Fetch Target Sheet SchemaGoogle SheetsService
  4. 4List Input InvoicesGoogle DriveService
  5. 5Extract Invoice Fields AI AgentAgentModel
  6. 6Extract Target Columns SchemaCodeLogic
  7. 7Filter Unprocessed FilesMergeLogic
  8. 8Parse AI Output & Attach MetadataCodeLogic
  9. 9Fetch Processed RecordsGoogle SheetsService
  10. 10Download Invoice PDFGoogle DriveService
  11. 11Append Extracted Data to Google SheetsGoogle SheetsService
  12. 12Prepare OCR Request PayloadCodeLogic
  13. 13Extract Text via Local OCRHttp RequestService

How it's built

Starts on
An event in a connected app
Steps
13
Size
Medium: a working afternoon
Connects to
Google Drive, Google Sheets
Model
a local model

Questions

What does it need to run?

An n8n account, plus your own Google Drive and Google Sheets accounts, and a key for a local model. 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 a local model. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 13 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 13 steps before you point it at anything that matters.