Automation library · Money admin

AI-Powered Invoice Processing Automation with Mistral

Started by an event in a connected app, and works across Google Drive. It hands the judgement calls to OpenAI. 10 steps: a working afternoon to understand properly.

MediumCalls a model: OpenAI

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

The flow

Starts it 1Model 3Logic 2Service 4

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

  1. 1Google Drive Trigger: New Invoice DetectionGoogle Drive triggerStarts it
  2. 2JSON Parser: Invoice StructureOutput Parser StructuredModel
  3. 3AI Engine: GPT-5.2Lm Chat Open AiModel
  4. 4Google Drive: Download InvoiceGoogle DriveService
  5. 5AI Agent: Structure Invoice DataAgentModel
  6. 6Convert invoice File to Base64Extract From FileService
  7. 7Mistral OCR API: Extract TextHttp RequestService
  8. 8Data Splitter: OCR PagesSplit OutLogic
  9. 9Field Extractor: Page MarkdownSetLogic
  10. 10Data Aggregator: Combine PagesSummarizeService

How it's built

Starts on
An event in a connected app
Steps
10
Size
Medium: a working afternoon
Connects to
Google Drive
Model
OpenAI

Questions

What does it need to run?

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

How long does it take to set up?

Plan an afternoon. 10 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 10 steps before you point it at anything that matters.