Billing Backend API

A simple Billing Backend API developed using FastAPI, MySQL and SQLAlchemy.

Project Overview

The Billing Backend API is a REST API developed using FastAPI, MySQL, and SQLAlchemy to manage invoices and payments. It provides CRUD operations, validation, error handling, and database integration for billing management. The APIs were tested using Swagger UI and Postman as part of the project testing and documentation.

GitHub Repository

https://github.com/Anooppgowda/billing-api

Project Date

13 July 2026

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Team Members and Responsibilities

Team Member	Responsibility
Anoop P	Billing API basic setup
ARAGONDA NIKHIL	Billing database and models
Chintha Gayathri	Billing CRUD operations
Kallam Poojitha	Billing validation and error handling
Sheetal	Billing API testing and documentation

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Technologies Used

• Python
• FastAPI
• MySQL
• SQLAlchemy
• Pydantic
• PyMySQL
• Uvicorn
• Swagger UI
• Postman
• Git
• GitHub

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Project Structure

billing-api/ │ ├── app/ │ ├── api/ │ │ └── routes/ │ │ └── billing.py │ │ │ ├── core/ │ │ ├── config.py │ │ └── exceptions.py │ │ │ ├── crud/ │ │ └── billing.py │ │ │ ├── db/ │ │ └── database.py │ │ │ ├── models/ │ │ ├── billing.py │ │ ├── customer.py │ │ ├── invoice_item.py │ │ └── payment.py │ │ │ ├── schemas/ │ │ └── billing.py │ │ │ └── main.py │ ├── tests/ ├── .gitignore ├── README.md └── requirements.txt

Run the Project

uvicorn app.main:app --reload