API Reference Documentation

Table of Contents

• Overview
• When to Use
• Quick Start
• Reference Guides
• Best Practices

Overview

Generate professional API documentation that developers can use to integrate with your API, including endpoint specifications, authentication, request/response examples, and interactive documentation.

When to Use

• Documenting REST APIs
• Creating OpenAPI/Swagger specifications
• GraphQL API documentation
• SDK and client library docs
• API authentication guides
• Rate limiting documentation
• Webhook documentation
• API versioning guides

Quick Start

Minimal working example:

openapi: 3.0.3
info:
  title: E-Commerce API
  description: |
    Complete API for managing e-commerce operations including products,
    orders, customers, and payments.

    ## Authentication
    All endpoints require Bearer token authentication. Include your API key
    in the Authorization header: `Authorization: Bearer YOUR_API_KEY`

    ## Rate Limiting
    - 1000 requests per hour for authenticated users
    - 100 requests per hour for unauthenticated requests

    ## Pagination
    List endpoints return paginated results with `page` and `limit` parameters.
  version: 2.0.0
  contact:
    name: API Support
    email: api@example.com
    url: https://example.com/support
  license:
    name: MIT
    url: https://opensource.org/licenses/MIT
// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide	Contents
OpenAPI Specification Example	openapi: 3.0.3
List Products	List Products

Best Practices

✅ DO

• Use OpenAPI 3.0+ specification
• Include request/response examples for every endpoint
• Document all query parameters and headers
• Provide authentication examples
• Include error response formats
• Document rate limits and pagination
• Use consistent naming conventions
• Include SDK examples in multiple languages
• Document webhook payloads
• Provide interactive API explorer (Swagger UI)
• Version your API documentation
• Include migration guides for breaking changes

❌ DON'T

• Skip error response documentation
• Forget to document authentication
• Use inconsistent terminology
• Leave endpoints undocumented
• Ignore deprecation notices
• Skip versioning information