Extract invoice data from email to Google Sheets using GPT-4o AI automation
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 this workflow does
This AI workflow has 9 nodes and runs on Gmail events. Along the way it connects Gmail, Google Sheets, Google Drive and OpenAI Chat Model.
How it runs
Trigger: On Gmail events.
- Attachment Verification (Filter): keeps only the items that match a condition
- Extract Invoice data (Extract from File): extracts data from a file (pdf)
- Invoice AI Agent (AI Agent): runs an AI agent, with model: OpenAI Chat Model
- Create blank spreadsheet (Google Sheets): work with spreadsheet
- Move spreadsheet in invoice folder (Google Drive): move
- Preparing Final data (Code): runs custom JavaScript code
- Final Spreadsheet with Invoice data (Google Sheets): append
Services it uses
Before you upgrade to n8n 3.0
1 thing in this workflow is removed in n8n 3.0. Fix it before you upgrade:
- AI Agent v1 (old agent modes) in Invoice AI Agent (v1.9): replace with Latest AI Agent node (Tools Agent). For SQL Agent, use a Postgres or MySQL tool with a recent AI Agent.
- Also check Gmail Trigger below v1.4 runs as v1.4 (drafts skipped, max emails per poll).
Rather not rewrite it? Many of these flows can be rebuilt in Make (free plan).
| Removed in 3.0 | Replace with |
|---|---|
| AI Agent v1 (old agent modes) Invoice 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 (8)
- Gmail Trigger
n8n-nodes-base.gmailTrigger - Google Sheets
n8n-nodes-base.googleSheets - Google Drive
n8n-nodes-base.googleDrive - OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi - Filter
n8n-nodes-base.filter - Extract from File
n8n-nodes-base.extractFromFile - Code
n8n-nodes-base.code - AI Agent
@n8n/n8n-nodes-langchain.agent
From the author
Transform your invoice processing from manual data entry into an intelligent automation system. This powerful n8n workflow monitors Gmail for invoice attachments, extracts data using AI-powered analysis, and creates organized Google Sheets with all relevant…