Automate Invoice Processing with Gmail, OCR.space, Slack & Xero — n8n Workflow

High complexity⚡ Trigger20 nodes🏷️ Invoice Processing👁 3 viewsby Abi Odedeyi

Overview

How It Works

Trigger: Watches for new emails in Gmail with PDF/image attachments.
OCR: Sends the attachment to OCR.space API (https://ocr.space/OCRAPI) to extract invoice text.
Parsing: Extracts key fields:
Vendor
Invoice number
Amount
Currency
Invoice date
Due date
Description
Validation Logic:
Checks if amount is valid
Ensures vendor and invoice number are present
Flags high-value invoices (e.g., over $10,000)
Routing:
If invalid:

Nodes used

Google SheetsHTTP RequestSlackXeroGmailCode

Workflow Preview

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How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 20 nodes, connecting code, gmail, gmailtrigger.

  3. 3

    Output

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

Node Details (20)

GO

Google Sheets

googleSheets

#1
HT

HTTP Request

httpRequest

#2
SL

Slack

slack

#3
XE

Xero

xero

#4
GM

Gmail

gmail

#5
CO

Code

code

#6

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-invoice-processing-with-gmail-ocrspace-slack-xero 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 Invoice Processing with Gmail, OCR.space, Slack & Xero", "nodes": [...], ...}

Integrations

codegmailgmailtriggergooglesheetshttprequestifslackxero

Get This Workflow

Download and import in one click

View on n8n.io
Nodes20
Complexityhigh
Triggertrigger
Views3
CategoryInvoice Processing

Created by

Abi Odedeyi

Abi Odedeyi

@abiodedeyi

Tags

codegmailgmailtriggergooglesheetshttprequestifslackxero
⚡

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Automate Custom QuickBooks Invoice PDFs & Email with n8n

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