Classify Gmail invoice attachments with Google Gemini and forward to freee

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1. Workflow Overview

Classify and forward Gmail invoice attachments to freee with Google Gemini Automatically analyze email attachments with AI and forward invoices/receipts to freee's File Box. How it works 1. Polls G...

Best for

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

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.gmailtrigger, n8n-nodes-base.if, n8n-nodes-base.noop, n8n-nodes-base.gmail, @n8n/n8n-nodes-langchain.googlegemini, n8n-nodes-base.extractfromfile

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Classify Gmail invoice attachments with Google Gemini and forward to freee
Workflow name: Classify Gmail invoice attachments with Google Gemini and forward to freee

Classify and forward Gmail invoice attachments to freee with Google Gemini

Automatically analyze email attachments with AI and forward invoices/receipts to freee's File Box.

How it works

Polls Gmail for new emails with attachments every minute
Extracts text from PDF attachments and sends it to Google Gemini for classification
If Gemini identifies the document as an invoice or receipt, re-fetches the attachment and forwards it to freee's File Box email address

Setup steps

Get freee receiving email: freee Accounting → File Box → Settings
Set environment variable: Set FREEE_FORWARDING_EMAIL to freee's receiving address
Configure Credentials:

Gmail OAuth2 (read + send permissions)
Google Gemini API

Activate the workflow

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 - Workflow Overview

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

Block 2 - Filter Section

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

Block 3 - AI Section

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

Block 4 - Forward Section

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

Block 5 - Gmail Trigger

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

Block 6 - Has Attachment

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

Block 7 - No Attachment - End

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

Block 8 - Is Invoice or Receipt

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

Block 9 - Not Target - End

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

Block 10 - Forward to freee

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 11 - Classify Invoice/Receipt (AI)

Type / Role: @n8n/n8n-nodes-langchain.googleGemini - googleGemini
Config choices: Version 1.1

Block 12 - Extract Text from PDF

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

Block 13 - Get Attachment

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

3. Summary Table

Workflow	Classify Gmail invoice attachments with Google Gemini and forward to freee
Complexity	intermediate
Nodes	13
Categories	Invoice Processing, AI Summarization
Author	daisuke
Published	06 Feb 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/13237/13237.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 Classify Gmail invoice attachments with Google Gemini and forward to freee 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.

daisuke

2 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.gmailtrigger n8n-nodes-base.if n8n-nodes-base.noop n8n-nodes-base.gmail @n8n/n8n-nodes-langchain.googlegemini n8n-nodes-base.extractfromfile

Complexity

intermediate

Published 06 Feb 2026

Likes 0

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Install path: /data/workflows/13237/13237.json

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Classify Gmail invoice attachments with Google Gemini and forward to freee

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Classify and forward Gmail invoice attachments to freee with Google Gemini

How it works

Setup steps

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Workflow Overview

Block 2 - Filter Section

Block 3 - AI Section

Block 4 - Forward Section

Block 5 - Gmail Trigger

Block 6 - Has Attachment

Block 7 - No Attachment - End

Block 8 - Is Invoice or Receipt

Block 9 - Not Target - End

Block 10 - Forward to freee

Block 11 - Classify Invoice/Receipt (AI)

Block 12 - Extract Text from PDF

Block 13 - Get Attachment

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