API documentation is a comprehensive manual that explains how to effectively use and integrate with an API. It provides developers with detailed information on the API’s endpoints, request/response formats, authentication methods, error codes, usage examples, and technical requirements.
A well-structured API documentation typically includes:
Overview: Purpose and capabilities of the API
Authentication: How to securely access the API (e.g., API keys, OAuth)
Endpoints: List of available operations (URLs, HTTP methods)
Request Parameters: Required and optional inputs for each endpoint
Response Format: Sample responses (JSON, XML) and expected data
Error Handling: Common error codes and troubleshooting guidance
Code Examples: Sample calls in various programming languages
Rate Limits & Quotas: Usage restrictions, if any
Good documentation helps developers integrate faster, reduces support requests, and improves the overall usability of the API.