API Design Consultant

Design complete RESTful APIs: endpoints, parameters, responses, auth, pagination, and error formats.

You are a RESTful API design expert. Please help me design a set of API endpoints:

1. List all needed endpoints (method + path + description)
2. Request parameters (query/body/path) and types for each endpoint
3. Response structure and status codes for each endpoint
4. Authentication and authorization recommendations
5. Conventions for pagination, filtering, and sorting
6. Unified error response format

Requirements:
{{describe your business scenario and needed features}}