Automated Invoice-PO Matching with Google Gemini AI and Email Notifications — n8n Workflow

Medium complexity⚡ Trigger14 nodes🏷️ Invoice Processing👁 5 viewsby Abdul Matheen

Overview

Automated Invoice-Processing AI Agent for n8n Overview The Automated Invoice-Processing AI Agent in n8n is designed to streamline and optimize invoice management for finance teams and accounts payable (AP) professionals. This solution addresses the common challenge of verifying invoice data manually, cross-checking it against purchase orders (POs), and ensuring compliance before releasing payments. By intelligently fetching invoices from Google Drive, extracting key details, validating them agai

Nodes used

Google SheetsGoogle DriveMicrosoft OutlookAI AgentStructured Output ParserGoogle Gemini Chat ModelInformation Extractor

Workflow Preview

Invoice PO matching process
1. It extracts the data from invoice
2. Using AI model extract the required fields from teh
3. Check if teh amount is greater than 5000
4. Send for review with PO
Extract the invoice data and extarct the requ
Check the amount is greater than 5000 and val
Approval for payment process
Send email if not match
tooltoolmodelparsermodel
⚡
G
Google Drive Trigger
Download file
E
Extract from File
Information Extractor
Google Gemini Chat Model
S
Switch
AI Agent
Google Gemini Chat Model1
P
PO_DB
U
Update_Row
I
If
Append row in sheet
Send a message
Structured Output Parser
14 nodes14 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 14 nodes, connecting agent, extractfromfile, googledrive.

  3. 3

    Output

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

Node Details (14)

GO

Google Sheets

googleSheets

#1
GO

Google Drive

googleDrive

#2
MI

Microsoft Outlook

microsoftOutlook

#3
AI

AI Agent

n8n-nodes-langchain.agent

#4
ST

Structured Output Parser

n8n-nodes-langchain.outputParserStructured

#5
GO

Google Gemini Chat Model

n8n-nodes-langchain.lmChatGoogleGemini

#6
IN

Information Extractor

n8n-nodes-langchain.informationExtractor

#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 automated-invoice-po-matching-with-google-gemini-ai-and-email-notifications 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": "Automated Invoice-PO Matching with Google Gemini AI and Email Notifications", "nodes": [...], ...}

Integrations

agentextractfromfilegoogledrivegoogledrivetriggergooglesheetsgooglesheetstoolifinformationextractorlmchatgooglegeminimicrosoftoutlookoutputparserstructuredswitch

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes14
Complexitymedium
Triggertrigger
Views5
CategoryInvoice Processing

Created by

Abdul Matheen

Abdul Matheen

@matheen

Tags

agentextractfromfilegoogledrivegoogledrivetriggergooglesheetsgooglesheetstoolifinformationextractorlmchatgooglegeminimicrosoftoutlook
⚡

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Standard accounting templates often fail to reflect a premium brand identity. This sophisticated n8n workflow bridges the gap between financial record-keeping and professional client presentation. By moving beyond the native limitations of QuickBooks Online, this automation enables businesses to generate high-end, multi-page PDF invoices that align perfectly with their corporate styling. The process begins the moment a new invoice is generated in QuickBooks, triggering a webhook that captures real-time billing data. The workflow then utilizes advanced HTML-to-File conversion and custom Code nodes to structure data into a polished, branded layout. It handles complex logic such as line-item merging and multi-page formatting automatically. Once the document is rendered, the system bypasses generic 'no-reply' senders by routing the finalized PDF through your preferred email provider. This ensures a seamless, white-labeled experience for your clients while eliminating the manual overhead of exporting, styling, and attaching files. Ideal for agencies and service providers, this flow guarantees that your most frequent touchpoint—the bill—is as professional as your work. **Common Use Cases:** - High-end creative agencies requiring bespoke, white-labeled billing documents for premium clients. - Automated recurring subscription billing where custom tax disclosures or localized branding are required. - Service-based businesses needing to attach dynamic project reports or terms of service directly to QuickBooks invoices.

🔗 Webhook·12 nodes