AI Invoice Automation Backend I built

AI Invoice Automation Backend

I built an AI-powered backend that automates the process of handling invoices.

The system takes an invoice PDF as input, extracts important information such as invoice number, vendor name, invoice date, items, and total amount, and converts it into structured data that can be easily stored and processed.

What the system does

Uploads and processes invoice PDFs

Extracts text from invoices using OCR

Uses AI to identify and structure important invoice information

Validates the extracted data

Stores invoice information in a MySQL database

Provides REST APIs using FastAPI

Uses SQLAlchemy for database operations

Sends invoice-related information through email

Keeps API credentials and configuration secure using environment variables

Tech Stack

Python · FastAPI · MySQL · SQLAlchemy · OpenAI API · Tesseract OCR · PDF Processing · SendGrid

The main goal of the project was to reduce manual invoice data entry and automate the complete invoice-processing workflow through APIs.