Automate Invoice Processing & Stock Management with AI, Gmail, Sheets & Slack β€” n8n Workflow

Medium complexity⚑ Trigger12 nodes🏷️ Invoice Processingby InfyOm Technologies

Overview

βœ… What problem does this workflow solve?

Order processing often involves manual invoice reading, stock checking, and back-and-forth communication between procurement and operations teams. This workflow automates the entire procurement decision flow β€” from reading incoming order emails to extracting structured data, checking stock, and creating either a purchase requisition or a work order automatically.

πŸ’‘ Main Use Cases

πŸ“₯ Auto-extract order and invoice details from incoming emails
πŸ“¦ Validat

Nodes used

Google SheetsSlackGmailAI AgentOpenAI Chat ModelStructured Output Parser

Workflow Preview

How it works
This workflow automates order procurement by monitoring
Invoice Processing
Extracts order data from PDF attachments using AI to st
Check stock availability or not
- If available, then create a work order and notify via
- In not available, then create a Purchase Requisition
modelparser
⚑
G
Gmail Trigger
E
Extract from File
Structured Output Parser
OpenAI Chat Model
Send a message
Extract Invoice Record
Sales Order Creation
Stock & Shortage Check
I
If Negative
Create Purchase Requisit…
Create Work Order
Send Order Summary
12 nodes11 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 12 nodes, connecting agent, extractfromfile, gmail.

  3. 3

    Output

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

Node Details (12)

GO

Google Sheets

googleSheets

#1
SL

Slack

slack

#2
GM

Gmail

gmail

#3
AI

AI Agent

n8n-nodes-langchain.agent

#4
OP

OpenAI Chat Model

n8n-nodes-langchain.lmChatOpenAi

#5
ST

Structured Output Parser

n8n-nodes-langchain.outputParserStructured

#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 β†’ New β†’ Import from file.
  3. 3Select the downloaded automate-invoice-processing-stock-management-with-ai-gmail-sheets-slack 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 β†’ Import from JSON:

{ "name": "Automate Invoice Processing & Stock Management with AI, Gmail, Sheets & Slack", "nodes": [...], ...}

Integrations

agentextractfromfilegmailgmailtriggergooglesheetsiflmchatopenaioutputparserstructuredslack

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes12
Complexitymedium
Triggertrigger
CategoryInvoice Processing

Created by

InfyOm Technologies

InfyOm Technologies

@infyom

Tags

agentextractfromfilegmailgmailtriggergooglesheetsiflmchatopenaioutputparserstructuredslack
⚑

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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 touchpointβ€”the billβ€”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.

πŸ”— WebhookΒ·12 nodes