🌐 API Service Name

A fast, scalable, fully-typed REST API for managing Resources.

📑 Table of Contents

• About
• How It Works
• Real-World Use Cases
• Features
• Tech Stack
• File Tree
• Getting Started
• Usage
• Authentication
• Rate Limiting
• API Reference
• Error Handling
• Testing
• Deployment
• License

🧾 About

Tagline — One sentence describing the API.

Describe what this API does, what data or service it exposes, and who should integrate with it.

Example:

The Items API is a RESTful service that manages product catalog data for e-commerce platforms. It provides fast, cached endpoints for reading inventory and authenticated endpoints for catalog management, designed to handle thousands of requests per second.

⚙️ How It Works

Describe the request lifecycle at a high level:

Client Request
    │
    ▼
Rate Limiter → Auth Middleware → Validator → Controller → Service → DB/Cache
    │
    ▼
JSON Response (success or structured error)

1. Auth: Every request is validated against a JWT or API key.
2. Validation: Request body and params are checked with Zod schemas before any business logic runs.
3. Caching: Read-heavy endpoints are cached in Redis with TTL-based invalidation.
4. Response: All responses follow a consistent envelope format.

💼 Real-World Use Cases

• Mobile Apps: A React Native app calls this API to fetch and update user data without embedding business logic client-side.
• Third-Party Integrations: Partners use the public API with scoped API keys to read product data into their own systems.
• Microservice Communication: Other internal services call this API as a single source of truth for the resource domain.
• Webhooks & Automation: Zapier or Make.com users connect to this API to trigger workflows on data changes.

✨ Features

• Fully typed with TypeScript
• JWT authentication with refresh token rotation
• Role-based authorization middleware
• Rate limiting per API key / IP
• Request validation with Zod
• Swagger / OpenAPI 3.0 docs
• Structured JSON logging with Pino
• Consistent error response format

🛠️ Tech Stack

📂 File Tree

api/
├── src/
│   ├── controllers/      # Route handlers
│   ├── models/           # DB schemas / entities
│   ├── routes/           # API route definitions
│   ├── middleware/        # Auth, rate-limit, error handlers
│   ├── services/         # Business logic layer
│   ├── validators/       # Zod request schemas
│   └── utils/            # Shared helpers
├── prisma/
├── tests/
├── swagger.yml
├── .env.example
└── server.ts

🏁 Getting Started

git clone https://github.com/username/api-project.git
cd api-project
npm install
cp .env.example .env
npm run db:migrate
npm run dev

💡 Usage

Make your first request

# Get all items (public endpoint)
curl https://api.example.com/v1/items

# Create an item (authenticated)
curl -X POST https://api.example.com/v1/items   -H "Authorization: Bearer YOUR_TOKEN"   -H "Content-Type: application/json"   -d '{"name": "My Item", "description": "A great item"}'

SDK / Client Example

import { ApiClient } from '@yourorg/api-sdk';

const client = new ApiClient({ apiKey: process.env.API_KEY });

const items = await client.items.list({ page: 1, limit: 20 });
const item  = await client.items.create({ name: 'New Item' });

📖 Full interactive docs: https://api.example.com/docs

🔑 Authentication

Authorization: Bearer <YOUR_TOKEN>

Get a token:

POST /api/v1/auth/login
Content-Type: application/json

{ "email": "user@example.com", "password": "your_password" }

Response:

{ "accessToken": "eyJ...", "refreshToken": "eyJ...", "expiresIn": 3600 }

🚦 Rate Limiting

Response headers on every request:

X-RateLimit-Limit: 100
X-RateLimit-Remaining: 95
X-RateLimit-Reset: 1714000000

📚 API Reference

Items

GET

/api/v1/items

GET

/api/v1/items/:id

POST

/api/v1/items

PUT

/api/v1/items/:id

DELETE

/api/v1/items/:id

⚠️ Error Handling

All errors follow a consistent format:

{
  "error": {
    "code": "RESOURCE_NOT_FOUND",
    "message": "The requested item does not exist.",
    "status": 404
  }
}

UNAUTHORIZED

FORBIDDEN

RESOURCE_NOT_FOUND

VALIDATION_ERROR

RATE_LIMIT_EXCEEDED

INTERNAL_ERROR

🧪 Testing

npm run test                # Unit tests
npm run test:integration    # Integration tests
npm run test:coverage       # Coverage report

🚢 Deployment

npm run build
npm run start

# Docker
docker build -t api-service .
docker run -p 3000:3000 --env-file .env api-service

📝 License

Distributed under the MIT License. See LICENSE for more information.