Automated Invoice Processing System with OCR & AI - AP Automation with Airtable

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Built by Milan Vasarhelyi - SmoothWork Milan Vasarhelyi - SmoothWork
Created on June 05, 2026

Description


Video Introduction

Invoice Processing Automation

This template is the automation behind a simple incoming invoice automation tool (AP automation) tool built in Airtable.

Link to the Airtable base, and all other tools used, is in notes on the left of the automation.

How it works
See how it works on video: Full Video Walkthrough

1) We get an email with an invoice attachment:


2) Processes and adds the data to an Airtable interface:

3) Once we approved it and Due date approaches, it shows among Due invoices, where we can track if it's paid.

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Nodes Used (9)

Airtable
n8n-nodes-base.airtable
Basic LLM Chain
@n8n/n8n-nodes-langchain.chainLlm
Gmail
n8n-nodes-base.gmail
HTTP Request
n8n-nodes-base.httpRequest
Information Extractor
@n8n/n8n-nodes-langchain.informationExtractor
OpenAI
@n8n/n8n-nodes-langchain.openAi
OpenAI Chat Model
@n8n/n8n-nodes-langchain.lmChatOpenAi
OpenAI Model
@n8n/n8n-nodes-langchain.lmOpenAi
Structured Output Parser
@n8n/n8n-nodes-langchain.outputParserStructured