Log LINE invoice photos to Google Sheets with OCR.space and Gemini AI — n8n Workflow

Medium complexity🔗 Webhook15 nodes🏷️ Invoice Processing👁 1 viewsby Ryo Sayama

Overview

Who is this for

Freelancers, small business owners, and accounting teams in Japan who receive invoices and want to eliminate manual data entry into spreadsheets.

What this workflow does

Send an invoice photo to your LINE bot and the rest is automatic. The workflow fetches the image via LINE Messaging API, runs it through OCR.space to extract raw text, then passes that text to a Gemini AI Agent to parse the key fields — invoice number, date, due date, vendor name, subtotal, tax, and total. The

Nodes used

Google SheetsHTTP RequestCodeAI AgentGoogle Gemini Chat Model

Workflow Preview

How it works
Send a photo of any invoice to the LINE bot and the res
Image Intake
Receives the invoice image from LINE via Webhook, filte
Text Extraction
Converts the image to Base64 and sends it to OCR.space,
AI Parsing
Gemini AI reads the raw OCR text and structures it into
Log & Notify
Appends the parsed invoice data to Google Sheets and se
Error Handling
Checks whether the AI successfully parsed the invoice a
LINE Reply
Sends a success message or a clear error message back t
model
Google Gemini Chat Model
⚡
R
Receive LINE Webhook
⚡
R
Return 200 OK to LINE
C
Check Image Message
V
Variables (API Key Manag…
Fetch Image from LINE
Convert Image to Base64
OCR - Extract Text from …
AI Agent - Parse Invoice…
Parse & Format JSON
E
Error Check
Append to Google Sheets
LINE Reply - Success
LINE Reply - Error
LINE Reply - Not an Image
15 nodes14 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a webhook trigger.

  2. 2

    Process

    Data flows through 15 nodes, connecting agent, code, googlesheets.

  3. 3

    Output

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

Node Details (15)

GO

Google Sheets

googleSheets

#1
HT

HTTP Request

httpRequest

#2
CO

Code

code

#3
AI

AI Agent

n8n-nodes-langchain.agent

#4
GO

Google Gemini Chat Model

n8n-nodes-langchain.lmChatGoogleGemini

#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 log-line-invoice-photos-to-google-sheets-with-ocrspace-and-gemini-ai 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": "Log LINE invoice photos to Google Sheets with OCR.space and Gemini AI", "nodes": [...], ...}

Integrations

agentcodegooglesheetshttprequestiflmchatgooglegeminirespondtowebhooksetwebhook

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes15
Complexitymedium
Triggerwebhook
Views1
CategoryInvoice Processing

Created by

Ryo Sayama

Ryo Sayama

@sayama

Tags

agentcodegooglesheetshttprequestiflmchatgooglegeminirespondtowebhooksetwebhook
⚡

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🔗 Webhook·12 nodes