AI-powered PDF invoice parser with Google Drive, Google Sheets & OpenAI
Needs changesNeeds changes. This template uses 1 thing(s) that n8n 3.0 removes: AI Agent v1 (old agent modes). 1 breaking item(s) found. Static check, last run 2026-10-19.
What to replace before upgrading
| Removed in 3.0 | Replace with |
|---|---|
| AI Agent v1 (old agent modes) Invoice Parser AI Agent (v1.9) | Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent. |
Nodes used (7)
- OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi - Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured - Google Drive Trigger
n8n-nodes-base.googleDriveTrigger - Google Drive
n8n-nodes-base.googleDrive - Extract from File
n8n-nodes-base.extractFromFile - AI Agent
@n8n/n8n-nodes-langchain.agent - Google Sheets
n8n-nodes-base.googleSheets
What it does
Who is this for? This workflow is perfect for: Companies that manage invoices through Google Drive Business owners who want to minimize manual data entry and maximize accuracy Accounting teams and finance departments seeking to automate invoice processing What problem is this workflow solving? Processing invoices manually is time-consuming, error-prone, and inconsistent. This workflow solves those issues by: Automating invoice processing from detection to data extraction to storage Improving accuracy by using AI to extract key invoice data fields reliably Reducing human workload while maintaining compliance and consistency What this workflow does This workflow creates a fully automated invoice processing system by: 1. Monitoring a Google Drive folder for new PDF invoices in real time 2. Downloading the PDF files and extracting their content using OCR technology 3. Using AI (OpenAI) to parse and extract key invoice fields such as invoice number, date, total amount, vendor name, itemized details, tax, and category 4. Validating the extracted data to ensure compliance with a structured JSON schema 5. Storing structured data in Google Sheets for easy access, review, and reporting Key Features: AI-powered extraction handles both text-based and scanned PDF invoices Provides a structured, searchable invoice database in Google Sheets Configured to run as frequently as the user needs, ensuring timely processing. Setup 1. Copy the Google Sheet template here: 👉 PDF Invoice Parser – Google Sheet Template 2. Connect your Google Drive account to the Drive Trigger and File Download nodes 3. Add your OpenAI API key in the AI Parser node 4. Link the Google Sheet in the final storage node 5. Drop a test invoice PDF into the monitored Drive folder Required Credentials: OpenAI API Key Google Drive Credentials Google Sheets Credentials How to customize this workflow to your needs Modify the polling interval (default: every minute) for higher/lower frequency. Integrate with your accounting software by adding nodes (e.g., QuickBooks, Xero). Use alternative LLM such as Gemini, Claude. Contact me for consulting and support: 📧 [email protected]