Extract and organize Colombian invoices with Gmail, GPT-4o & Google Workspace

Name: Extract and organize Colombian invoices with Gmail, GPT-4o & Google Workspace
Availability: InStock
Rating: 4.5 (310 reviews)
Author: Juan Sanchez

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🧾 Personal Invoice Processor

This N8N workflow automates the extraction and organization of personal invoices in Colombia received via Gmail. It includes the following key steps:

🔁 Flow Summary

Email Trigger
- Polls Gmail every 30 minutes for emails with .zip attachments (assumed to contain invoices).
- Expects ZIP file following DIAN standards.
ZIP File Handling
- Extracts all files.
- Filters only PDF and XML files for processing.
Data Extraction & Processing
- Uses LangChain Agent + OpenAI (GPT-4o-mini) to extract:
  - Tipo de documento (Factura / Nota Crédito)
  - Número de factura
  - Fecha de emisión (YYYY-MM-DD)
  - NIT emisor y receptor (sin dígito de verificación)
  - Razón social del emisor
  - Subtotal, IVA, Total
  - CUFE
  - Resumen de compra (max 20 words, formatted sentence)
Validation
- Ensures Total = Subtotal + IVA using a calculator node.
Storage
- Uploads the original PDF to Google Drive.
- Renames the file to: YYYY-MM-DD-NUMERO_FACTURA.pdf.
- Inserts or updates invoice details in Google Sheets using a unique Key (NIT_Emisor + Numero_Factura) to prevent duplication.

> ⚙️ Designed for personal use with minimal latency tolerance and high automation reliability.

Juan Sanchez

0 workflows

Nodes

set gmail telegram agent google-gemini

Complexity

advanced

Published 09 May 2025

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