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api-designer

Design REST and GraphQL API architectures and generate OpenAPI 3.1 specifications.

8|1|Updated Feb 27, 2026
Search Tags:#openapi#rest#graphql#error-handling#pagination#api-design#api-versioning
One-click install
npx skills add https://github.com/thesaifalitai/claude-setup --skill api-designer-thesaifalitai
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: api-designer
Source: https://github.com/thesaifalitai/claude-setup/tree/main/skills/api-designer
Command: npx skills add https://github.com/thesaifalitai/claude-setup --skill api-designer-thesaifalitai

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Designing APIs without clear contracts, consistent patterns, or documented behavior causes friction for client developers, increases bugs, and complicates maintenance. This Skill provides structured API architecture guidance and generates complete, developer-friendly OpenAPI 3.1 specifications to reduce ambiguity, speed implementation, and ensure backward-compatible evolution.

Core Features & Use Cases

  • Resource Modeling & Endpoint Design: Define resources, relationships, URI patterns, and appropriate HTTP methods for REST and GraphQL schema boundaries.
  • Specification Generation: Produce OpenAPI 3.1 YAML or JSON specs with request/response schemas, examples, and documentation suitable for code generation and client SDKs.
  • Operational Standards: Recommend pagination strategies, versioning/deprecation policies, authentication flows, and a standardized error response catalog for consistency across teams.
  • Use Case: Create a paginated user management API with versioning, JWT authentication, and a documented error taxonomy for client integration.

Quick Start

Design an OpenAPI 3.1 specification for a user management REST API that includes resource models, pagination, versioning strategy, JWT authentication, and comprehensive error responses.

Frequently Asked Questions about api-designer

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

FAQPage Schema
How do I generate an OpenAPI 3.1 specification for a REST API?▼

OpenAPI 3.1 specifications are generated by defining resource models, endpoint URIs, and request/response schemas. This produces complete YAML or JSON specs suitable for code generation and client SDKs.

What is the best way to design pagination and error handling for web services?▼

Designing pagination and error handling involves applying standardized patterns like cursor or offset pagination and a structured error response catalog. This ensures operational consistency and reduces client integration friction.

How do I structure resource modeling and endpoints for a GraphQL API?▼

Structuring GraphQL resources requires defining schema boundaries, relationships, and appropriate query methods. This provides a developer-friendly architecture that clearly separates data fetching operations and mutations.

Can I use this to design JWT authentication flows and API versioning strategies?▼

Yes, you can design JWT authentication flows and API versioning strategies. It recommends operational standards including versioning, deprecation policies, and authentication flows to ensure backward-compatible API evolution.

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