Automation library · Money admin

Process Telegram invoice OCR with OCR.space and OpenAI

Started by an incoming Telegram message, and works across Google Drive, Google Sheets and Telegram. It hands the judgement calls to OpenAI. 16 steps, 1 branch: a working afternoon to understand properly.

MediumCalls a model: OpenAI

Download free
16 stepsMedium: a working afternoon
1Branch: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 1Model 4Logic 6Service 5

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

  1. 1Configure Workflow VariablesSetLogic
  2. 2Receive Invoice in TelegramTelegram triggerStarts it
  3. 3OpenAI Chat ModelLm Chat Open AiModel
  4. 4Validate Invoice JSON OutputOutput Parser StructuredModel
  5. 5Download Telegram Invoice FileTelegramService
  6. 6Extract Structured Invoice DataAgentModel
  7. 7Write Telegram Confirmation MessageAgentModel
  8. 8Detect File TypeCodeLogic
  9. 9Format Invoice Fields for SheetsCodeLogic
  10. 10Send Confirmation to TelegramTelegramService
  11. 11Route Supported File TypesSwitchLogic
  12. 12Merge Invoice Data with Original FileMergeLogic
  13. 13Save Invoice Data to Google SheetsGoogle SheetsService
  14. 14Extract Invoice Text with OCR.spaceHttp RequestService
  15. 15Upload Original Invoice to Google DriveGoogle DriveService
  16. 16Prepare Confirmation Message DataSetLogic

How it's built

Starts on
An incoming Telegram message
Steps
16, with 1 branch
Size
Medium: a working afternoon
Connects to
Google Drive, Google Sheets, Telegram
Model
OpenAI

Questions

What does it need to run?

An n8n account, plus your own Google Drive, Google Sheets and Telegram accounts, and a key for OpenAI. 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 OpenAI. 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.