Automate WhatsApp Invoice Processing with OCR, GPT-4 Mini & Google Services — n8n Workflow

Medium complexity Trigger11 nodes🏷️ Invoice Processingby Muhammad Ali

Overview

Description

How it works
This powerful workflow helps businesses and freelancers automatically manage invoices received on WhatsApp.
It detects new messages, downloads attached invoices, extracts key data using OCR (Optical Character Recognition), summarizes the details with AI, updates Google Sheets for record-keeping, saves files to Google Drive, and instantly replies with a clean summary message all without manual effort.

Perfect for small businesses, agencies, accountants, and freela

Nodes used

Google SheetsHTTP RequestGoogle DriveWhatsApp Business CloudCodeAI AgentOpenAI Chat Model

Workflow Preview

Whatsapp Intake
OCR & Parsing
AI Summary & Reply
Update & Save Invoice Record
Chat Model
🧾 WhatsApp Invoice Automation
How it works
This workflow automates invoice processing via WhatsApp
model
W
WhatsApp Trigger
Analyze Image
Download File
Add Invoice To Drive
Update DataBase
Reply
Original Invoice Retrieval
Invoice Agent
Parse Text
OpenAI Chat Model
Get Download URL
11 nodes10 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 11 nodes, connecting agent, code, googledrive.

  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
GO

Google Drive

googleDrive

#3
WH

WhatsApp Business Cloud

whatsApp

#4
CO

Code

code

#5
AI

AI Agent

n8n-nodes-langchain.agent

#6
OP

OpenAI Chat Model

n8n-nodes-langchain.lmChatOpenAi

#7

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 automate-whatsapp-invoice-processing-with-ocr-gpt-4-mini-google-services 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": "Automate WhatsApp Invoice Processing with OCR, GPT-4 Mini & Google Services", "nodes": [...], ...}

Integrations

agentcodegoogledrivegooglesheetshttprequestlmchatopenaiwhatsappwhatsapptrigger

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes11
Complexitymedium
Triggertrigger

Created by

Muhammad Ali

Muhammad Ali

@ali01

Tags

agentcodegoogledrivegooglesheetshttprequestlmchatopenaiwhatsappwhatsapptrigger

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🔗 Webhook·12 nodes