Finance & Accounting involved to set up

Invoice Processing

Monitors Google Drive for new PDF invoices, uses AI to classify expenses and generate XML.

Verified 2026-07-07

Finance-Accounting

What it does

You save time on bookkeeping by letting this agent automatically find your PDF invoices in Google Drive, classify their expenses, and convert the data into XML for accounting systems. It routes high-value invoices to you via email for approval while sending routine notifications directly to Slack.

How it works

When it runs: Triggered by an event · Event · on new PDF in Google Drive or manual webhook
How hands-off: Assists you, you do the final step
Setup: A bigger project · a few focused days
Works with: Google Drive, OpenAI Chat Model, Google Sheets, Slack, Gmail

Tools that fit

Services

Google Drive : Monitor and download invoice PDFs

Google Sheets : Archive processed invoices

Slack : Notify finance team of updates

Gmail : Send approval requests for high value invoices

LLM

OpenAI Chat Model : Classify expenses and detect anomalies

Watch out for

PDF text extraction often fails on scanned images, so add an OCR step like Tesseract before sending data to the LLM.
LLMs may hallucinate GL codes if not constrained by a strict list, so provide a fixed enumeration in the system prompt.
Large PDF files can exceed token limits or cause timeouts, so implement chunking or file size validation before processing.
XML generation might fail due to invalid characters from extracted text, so sanitize strings with regex before serialization.

Seen in the wild

n8n: Automate Invoice Processing with GPT-4o Classification and XML Export to Ac template

Want this running in your business?

This is what I do. I design and build AI agents like this one, and keep them running. If you want it set up for your team instead of doing it yourself, get in touch.

Get in touch

Who it's for

Built for finance and accounting teams who'd rather review a draft than build one from scratch.

Frequently asked questions

Who is this for?

finance and accounting teams, or anyone doing finance & accounting work who wants this handled automatically rather than manually.

How long does it take to set up?

A bigger project: plan for a few focused days to get it running end to end.

Related use cases

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