---
title: Examples Gallery
description: Runnable code examples demonstrating JustAPI features — the Rust-powered FastAPI alternative. From hello world to full e-commerce APIs.
keywords: [JustAPI examples, FastAPI alternative examples, Python API examples, Rust Python, JustAPI demo, API code examples]
---

## Getting Started

| Example | Description | File |
|---|---|---|
| [Hello World](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/01_hello_world.py) | Basic GET and parameterized routes | `examples/01_hello_world.py` |
| [Path & Query Params](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/02_path_query_params.py) | URL parameters and query strings | `examples/02_path_query_params.py` |
| [Request Body](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/03_request_body.py) | JSON body validation with Pydantic | `examples/03_request_body.py` |

## Core Features

| Example | Description | File |
|---|---|---|
| [Dependencies](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/04_dependencies.py) | Dependency injection with Depends | `examples/04_dependencies.py` |
| [Middleware](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/05_middleware.py) | Request/response interception | `examples/05_middleware.py` |
| [Error Handling](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/06_error_handling.py) | Custom exception handlers | `examples/06_error_handling.py` |
| [File Uploads](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/07_file_uploads.py) | Multipart form data | `examples/07_file_uploads.py` |
| [Routers](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/08_routers.py) | Modular APIRouter | `examples/08_routers.py` |
| [DB Integration](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/09_db_integration.py) | Database read/write | `examples/09_db_integration.py` |
| [WebSockets](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/10_websockets.py) | Real-time bidirectional comms | `examples/10_websockets.py` |

## Advanced

| Example | Description | File |
|---|---|---|
| [Plugin System](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/plugin_cache.py) | Custom plugin with caching | `examples/plugin_cache.py` |
| [Agent Demo](https://github.com/swadhinbiswas/JustAPI/blob/main/examples/agent_demo/app.py) | MCP tools, sessions, streaming | `examples/agent_demo/app.py` |

## Full Application

The [demo_shop](https://github.com/swadhinbiswas/JustAPI/tree/main/demo_shop) is a complete e-commerce application with 23 endpoints:

- Catalog (categories, products, sellers)
- Customers (register, lookup)
- Cart (add, remove, checkout)
- Orders (create, list, status lifecycle)
- Reviews (CRUD, analytics)

All examples are in the [`examples/`](https://github.com/swadhinbiswas/JustAPI/tree/main/examples) directory of the repository.

## See Also

- [Tutorials](/tutorials/hello-world/) — Step-by-step guides
- [API Reference](/api-reference/) — Complete API docs
- [CLI Scaffolder](/getting-started/cli-scaffolder/) — Generate project templates