Mistral OCR, GPT-4o-mini, and Google Sheets Integration for Enhanced Data Processing — n8n Workflow

Medium complexity⚡ Trigger11 nodes🏷️ Invoice Processingby Antonio Gasso

Overview

Process multiple invoices automatically using Mistral's dedicated OCR model—at approximately $0.002 per page. Upload batches of PDF, PNG, or JPG invoices through a simple form, extract structured financial data with AI, validate results with confidence scoring, and save everything to Google Sheets.

What this workflow does

Accepts multiple invoice uploads via n8n Form Trigger Processes files in batch with rate limiting Converts each file to base64 and sends to Mistral OCR API Extracts 9 standar

Nodes used

Google SheetsHTTP RequestCodeOpenAI Chat ModelInformation Extractor

Workflow Preview

Invoice OCR Processor with Mistral AI
Automatically extract data from invoices using Mistral'
⚠️ Required Credentials
1. Mistral API Key
- Go to console.mistral.ai
- Create HTTP Header Auth credential in n8n
- Header Name: `Authorization`
- Header Value: `
1. Input
2. OCR Processing
3. AI Extraction
4. Output
model
⚡
I
Invoice Upload Form
Split Files
L
Loop
Prepare OCR Request
Mistral OCR
Format OCR Text
OpenAI Model
Extract Invoice Fields
Validate & Score
Save to Sheets
R
Rate Limit
11 nodes11 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 11 nodes, connecting code, formtrigger, googlesheets.

  3. 3

    Output

    The workflow completes its automation and delivers the result to the configured destination.

Node Details (11)

GO

Google Sheets

googleSheets

#1
HT

HTTP Request

httpRequest

#2
CO

Code

code

#3
OP

OpenAI Chat Model

n8n-nodes-langchain.lmChatOpenAi

#4
IN

Information Extractor

n8n-nodes-langchain.informationExtractor

#5

How to Import This Workflow

  1. 1Click Download JSON button on the right to save the workflow file.
  2. 2Open your n8n instance. Go to Workflows → New → Import from file.
  3. 3Select the downloaded mistral-ocr-gpt-4o-mini-and-google-sheets-integration-for-enhanced-data-processing file and click Import.
  4. 4Set up credentials for each service node (API keys, OAuth, etc.).
  5. 5Click Test Workflow to verify everything works, then activate it.

Or paste directly in n8n → Import from JSON:

{ "name": "Mistral OCR, GPT-4o-mini, and Google Sheets Integration for Enhanced Data Processing", "nodes": [...], ...}

Integrations

codeformtriggergooglesheetshttprequestinformationextractorlmchatopenaisplitinbatcheswait

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes11
Complexitymedium
Triggertrigger
CategoryInvoice Processing

Created by

Antonio Gasso

Antonio Gasso

@akav

Tags

codeformtriggergooglesheetshttprequestinformationextractorlmchatopenaisplitinbatcheswait
⚡

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