API Documentation Generator

Generate comprehensive API documentation for the following code:

```[LANGUAGE]
[YOUR API CODE]
```

Create documentation including:
- Overview and purpose
- Authentication requirements
- Endpoints list with:
  - HTTP method and path
  - Description
  - Request parameters (path, query, body)
  - Request/Response examples in JSON
  - Error codes and messages
- Rate limiting info
- Code examples in: JavaScript, Python, cURL