api-design

Design RESTful and GraphQL APIs with consistent versioning and error handling.

58|20|Updated Feb 19, 2026
One-click install
npx skills add https://github.com/ABIvan-Tech/copilot-agentic-workflows --skill api-design-abivan-tech
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: api-design
Source: https://github.com/ABIvan-Tech/copilot-agentic-workflows/tree/main/skills/api-design
Command: npx skills add https://github.com/ABIvan-Tech/copilot-agentic-workflows --skill api-design-abivan-tech

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

API design often suffers from inconsistencies, poor versioning, unclear error handling, and inadequate documentation, leading to integration friction and high maintenance costs.

Core Features & Use Cases

  • RESTful and GraphQL design principles and patterns for scalable APIs.
  • Versioning strategies, error handling, and consistent response formats.
  • Documentation, testing, and performance considerations to create developer-friendly APIs.
  • Use Case: When building an external or internal API, this skill guides you to design resource-oriented URLs, proper HTTP semantics, and a clear error model.

Quick Start

Define an OpenAPI spec for a new REST endpoint and implement basic CRUD handlers following RESTful conventions.

Frequently Asked Questions about api-design

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

FAQPage Schema
How do I design RESTful APIs with consistent resource-oriented URLs and proper HTTP semantics?

To design RESTful APIs, you apply resource-oriented URLs, proper HTTP semantics, and consistent patterns. This ensures scalable API creation across services with clear resource definitions and standardized methods.

What's the best way to handle API versioning and error handling for scalable services?

The best way to handle API versioning and error handling is implementing consistent versioning strategies and standardized error formats. This reduces integration friction and maintenance costs across evolving services and teams.

Can I use OpenAPI and Swagger documentation for both RESTful and GraphQL API design?

Yes, you can use OpenAPI and Swagger documentation for RESTful API design. The skill guides you to define an OpenAPI spec and implement basic CRUD handlers following RESTful conventions for developer-friendly integration.

How do I structure API response formats for paging, caching, and performance optimization?

Structuring API response formats requires consistent patterns for paging, caching, and performance optimization. Applying these design principles ensures developer-friendly APIs with clear response models and efficient data retrieval.

When do I need to evolve an existing API versus building a completely new endpoint?

You need to evolve an existing API when applying versioning strategies to maintain backward compatibility, whereas building a new endpoint involves defining a fresh OpenAPI spec and implementing basic CRUD handlers following RESTful conventions.

Why does inconsistent API design lead to integration friction and high maintenance costs?

Inconsistent API design leads to integration friction because of poor versioning, unclear error handling, and inadequate documentation. Applying consistent design patterns and standardized error models reduces these maintenance costs.