Automation library · Documents and files

OCR document processing from LINE/Gmail with OpenAI

Started by another system calling it, and works across Gmail, Google Drive and Google Sheets. It hands the judgement calls to OpenAI. 17 steps, 1 branch, 1 loop or waits: a working afternoon to understand properly.

MediumCalls a model: OpenAI

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17 stepsMedium: a working afternoon
1Branch: places the flow splits
1Loop or waits
3Services it connects to

The flow

Starts it 2Model 2Logic 8Service 5

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

  1. 1LINE WebhookWebhookStarts it
  2. 2Gmail IMAP TriggerGmail triggerStarts it
  3. 3Workflow ConfigurationSetLogic
  4. 4Tag Source - EMAILSetLogic
  5. 5IfIfLogic
  6. 6Code in JavaScriptCodeLogic
  7. 7HTTP RequestHttp RequestService
  8. 8Merge TriggersMergeLogic
  9. 9Tag Source - LINESetLogic
  10. 10Upload to Google DriveGoogle DriveService
  11. 11Convert to Base64CodeLogic
  12. 12HTTP Request2Http RequestService
  13. 13Analyze imageOpen AiModel
  14. 14WaitWaitLogic
  15. 15Message a modelOpen AiModel
  16. 16Append row in sheetGoogle SheetsService
  17. 17Create Gmail DraftGmailService

How it's built

Starts on
Another system calling it
Steps
17, with 1 branch, 1 loop or waits
Size
Medium: a working afternoon
Connects to
Gmail, Google Drive, Google Sheets
Model
OpenAI

Questions

What does it need to run?

An n8n account, plus your own Gmail, Google Drive and Google Sheets accounts, 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.