Mistral OCR, GPT-4o-mini, and Google Sheets integration for enhanced data processing

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Best for

Invoice Processing automation workflows
AI Summarization automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.formtrigger, n8n-nodes-base.code, n8n-nodes-base.splitinbatches, n8n-nodes-base.httprequest, @n8n/n8n-nodes-langchain.lmchatopenai, @n8n/n8n-nodes-langchain.informationextractor, n8n-nodes-base.googlesheets

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Antonio Gasso.

Original n8n.io source

1.1 Workflow description

Title: Mistral OCR, GPT-4o-mini, and Google Sheets integration for enhanced data processing
Workflow name: Mistral OCR, GPT-4o-mini, and Google Sheets integration for enhanced data processing

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 standard fields using GPT-4o-mini Information Extractor
Validates data and assigns confidence scores (high/medium/low)
Saves all results to Google Sheets with status tracking

Fields extracted

Invoice Number, Date, Vendor Name, Tax ID, Subtotal, Tax Rate, Tax Amount, Total Amount, Currency

Use cases

Accountants processing client invoices in bulk
Small businesses digitizing paper receipts
Bookkeepers automating repetitive data entry
Finance teams building searchable invoice databases

Setup requirements

Mistral API Key (console.mistral.ai) — HTTP Header Auth credential
OpenAI API Key (platform.openai.com)
Google Sheets OAuth connection
Google Sheet with 15 columns (template in workflow notes)

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Main Overview

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 2 - Warning - Credentials

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 3 - Section 1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 4 - Section 2

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 5 - Section 3

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 6 - Section 4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 7 - Invoice Upload Form

Type / Role: n8n-nodes-base.formTrigger - formTrigger
Config choices: Version 2.2

Block 8 - Split Files

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 9 - Loop

Type / Role: n8n-nodes-base.splitInBatches - splitInBatches
Config choices: Version 3

Block 10 - Prepare OCR Request

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 11 - Mistral OCR

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 12 - Format OCR Text

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 13 - OpenAI Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.2

Block 14 - Extract Invoice Fields

Type / Role: @n8n/n8n-nodes-langchain.informationExtractor - informationExtractor
Config choices: Version 1

Block 15 - Validate & Score

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 16 - Save to Sheets

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.5

Block 17 - Rate Limit

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

3. Summary Table

Workflow	Mistral OCR, GPT-4o-mini, and Google Sheets integration for enhanced data processing
Complexity	advanced
Nodes	17
Categories	Invoice Processing, AI Summarization
Author	Antonio Gasso
Published	12 Dec 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/11755/11755.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Invoice Processing workflows AI Summarization workflows

Frequently asked questions

What does Mistral OCR, GPT-4o-mini, and Google Sheets integration for enhanced data processing do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Invoice Processing, AI Summarization use case.

Antonio Gasso

4 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.formtrigger n8n-nodes-base.code n8n-nodes-base.splitinbatches n8n-nodes-base.httprequest @n8n/n8n-nodes-langchain.lmchatopenai @n8n/n8n-nodes-langchain.informationextractor n8n-nodes-base.googlesheets

Complexity

advanced

Published 12 Dec 2025

Likes 0

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Install path: /data/workflows/11755/11755.json

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Mistral OCR, GPT-4o-mini, and Google Sheets integration for enhanced data processing

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

What this workflow does

Fields extracted

Use cases

Setup requirements

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Main Overview

Block 2 - Warning - Credentials

Block 3 - Section 1

Block 4 - Section 2

Block 5 - Section 3

Block 6 - Section 4

Block 7 - Invoice Upload Form

Block 8 - Split Files

Block 9 - Loop

Block 10 - Prepare OCR Request

Block 11 - Mistral OCR

Block 12 - Format OCR Text

Block 13 - OpenAI Model

Block 14 - Extract Invoice Fields

Block 15 - Validate & Score

Block 16 - Save to Sheets

Block 17 - Rate Limit

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions