API Design Skill

Design RESTful APIs with endpoints, JWT authentication, and error handling.

Updated Dec 13, 2025
One-click install
npx skills add https://github.com/gaurangrshah/gsc-plugins --skill api-design-skill-gaurangrshah
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: API Design Skill
Source: https://github.com/gaurangrshah/gsc-plugins/tree/main/plugins/appgen/skills/api-design
Command: npx skills add https://github.com/gaurangrshah/gsc-plugins --skill api-design-skill-gaurangrshah

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill helps teams design robust RESTful APIs by establishing clear endpoint strategies, authentication, and error handling to reduce integration complexity and bugs.

Core Features & Use Cases

  • REST API design principles including resource naming with plural nouns, proper nesting, and simple URLs
  • Standard endpoints with sample request/response formats and consistent error handling
  • Input validation strategies using schemas (e.g., Zod) and type-safe routing
  • Authentication and authorization patterns (JWT, RBAC, ownership checks)
  • Use cases across typical resources (users, products, orders) to accelerate API planning and implementation

Quick Start

Design a basic REST API for a new resource with JWT authentication and standard CRUD endpoints.

Frequently Asked Questions about API Design Skill

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I design a REST API with proper authentication and error handling?

To design a REST API, standardize endpoint conventions using plural nouns, enforce JWT-based authentication with RBAC, and implement detailed error formats. This approach ensures robust API services with proper resource naming, schema validation, and ownership checks.

What is the best way to structure REST endpoints for scalable microservices?

Structure REST endpoints for microservices using standardized conventions with plural nouns, proper nesting, and simple URLs. Apply consistent HTTP methods, pagination, and schema-based validation to reduce integration complexity across web and mobile backends.

How do I validate API request inputs using schemas in a RESTful service?

Validate API request inputs using schema-based validation strategies like Zod and type-safe routing. This enforces standardized endpoint conventions and detailed error formats, ensuring robust input validation across typical resources like users, products, and orders.

Does this API design approach support JWT-based RBAC and ownership checks?

Yes, this API design approach explicitly supports JWT-based authentication, RBAC, and ownership checks. It guides developers to implement these security patterns alongside standardized endpoints and schema-based validation for scalable web apps and microservices.

When do I need to implement pagination and standardized error formats in my API?

Implement pagination and standardized error formats in your API when building scalable services across web apps, mobile backends, and microservices. These features reduce integration complexity, manage large data sets, and provide clear error feedback.