n8n build
AI Invoice Intake, Validation & Approval Workflow
- n8n
- GPT-4o
- Gmail
- Slack
- Google Sheets
- Airtable
The client’s problem
Invoices took 2 to 3 days to process, every field was typed in by hand, and approvals were tracked in scattered places.
What I built
Engineered a fully automated accounts payable workflow that extracts invoice data from PDFs, images, and emails using GPT-4o vision AI, validates records, and routes approvals dynamically through Slack.
The outcome
Streamlined the invoice approval lifecycle with AI-powered extraction, automated escalation handling, and centralized financial visibility.
Before and after
Invoice processing speed
2-3 days
<4 hours
Manual data entry
Fully manual
Zero manual extraction
Approval tracking
Fragmented
Full Airtable audit trail
How it works
The flow
- Invoice in Gmail
- PDF, image or email read
- GPT-4o extracts the data
- Records validated
- Approval in Slack
- Airtable audit trail
Your Business Needs Better Systems, Not More Manual Work.
Let’s map the system your business needs.
Prefer a call? Book a 30-minute call.