OpenAPI

Generate OpenAPI 3.0.3 specifications for RESTful APIs with request bodies and error responses.

Updated Dec 30, 2025
One-click install
npx skills add https://github.com/vietlinhh02/cogninote --skill openapi-vietlinhh02
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: OpenAPI
Source: https://github.com/vietlinhh02/cogninote/tree/main/.claude/skills/api/openapi
Command: npx skills add https://github.com/vietlinhh02/cogninote --skill openapi-vietlinhh02

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill provides patterns and best practices for documenting REST APIs using the OpenAPI/Swagger specification, streamlining API design and development.

Core Features & Use Cases

  • API Documentation: Create clear, machine-readable specifications for RESTful services.
  • Code Generation: Enable automatic generation of API clients and server stubs.
  • Design-First Development: Facilitate a structured approach to API design before implementation.
  • Use Case: Define the structure for a new user API endpoint, including request/response schemas and error handling, to ensure consistency and enable automated client generation.

Quick Start

Use the OpenAPI skill to generate a basic specification for a user API with GET and POST methods.

Frequently Asked Questions about OpenAPI

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

FAQPage Schema
How do I generate OpenAPI specifications for a REST API?

You generate OpenAPI specifications by defining basic structures, request body definitions, and error response structures adhering to OpenAPI 3.0.3 standards. This Skill creates machine-readable specifications for RESTful services to streamline API design.

What is design-first API development and how does an OpenAPI specification help?

Design-first API development uses OpenAPI specifications to define REST API structures before writing backend code. This approach ensures consistency, enables clear machine-readable documentation, and facilitates automatic generation of API clients and server stubs.

Can I use OpenAPI 3.0.3 to define request body and error response schemas?

Yes, OpenAPI 3.0.3 standards support defining request body schemas and error response structures within your specifications. This allows you to comprehensively describe REST API endpoints, including their expected inputs and error handling protocols.

What is the best way to document REST APIs for client code generation?

The best way to document REST APIs for client generation is creating an OpenAPI 3.0.3 specification. By defining your API structure, request bodies, and error responses, you enable automated tools to generate corresponding API clients and server stubs.

Does this OpenAPI skill provide patterns for structuring a new user API endpoint?

Yes, the skill provides patterns to define the structure for a new user API endpoint, including GET and POST methods. It helps you outline request and response schemas along with error handling to ensure consistency across your RESTful services.

When do I need to create an OpenAPI specification for my RESTful service?

You need an OpenAPI specification when you want to establish a structured, machine-readable contract for your RESTful service before implementation. It is essential for streamlining API design, enabling code generation, and maintaining consistent API documentation.