openapi

Validate OpenAPI Specification files for structural and semantic issues.

Updated Dec 17, 2025

Search Tags:#documentation #api #openapi #validation #schema #reference

Ready to run

npx skills add https://github.com/mcclowes/vague-playground --skill openapi

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: openapi
Source: https://github.com/mcclowes/vague-playground/tree/main/.claude/skills/openapi
Command: npx skills add https://github.com/mcclowes/vague-playground --skill openapi

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps you validate, create/modify endpoints and schemas, check references, and enforce OpenAPI best practices to maintain consistent API contracts.

Core Features & Use Cases

Validate OpenAPI structure and metadata
Manage paths, operations, components, and references
Enforce best practices and consistency across APIs

Quick Start

Load an OpenAPI file and run the tool to validate against a spec, then iteratively refine paths and schemas to align with the contract.

Frequently Asked Questions about openapi

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

FAQPage Schema

How do I validate an OpenAPI specification file for structural errors?▼

OpenAPI validation checks your spec file against the OpenAPI standard to detect structural and semantic issues. Load your file and run the validator to identify missing required fields like openapi, info, and paths, ensuring your API contract is correct and complete.

What are best practices for defining paths and operations in an OpenAPI spec?▼

Best practices include assigning unique operationId values to each operation, defining all path parameters explicitly, documenting all response types comprehensively, and using case-sensitive field names consistently. The validator enforces these rules to maintain API consistency.

How do I reuse schemas and components across my OpenAPI specification?▼

Use $ref references to reuse schema definitions and components across your spec, reducing duplication and maintaining consistency. The validator ensures all references are properly defined and accessible within your components section.

Can I use OpenAPI validation to design new API endpoints?▼

Yes. Create or modify paths, operations, and schemas iteratively while validating against the spec. The validator provides feedback on structure and best practices, helping you design endpoints that conform to the OpenAPI standard.

What security definitions should I include in my OpenAPI spec?▼

OpenAPI specs support security definitions for authentication schemes. The validator ensures your security definitions are properly structured and referenced in operations, maintaining secure and well-documented API contracts.

Does OpenAPI validation work with existing API documentation?▼

Yes. Load your existing OpenAPI specification file to validate against standards and best practices. The validator identifies inconsistencies and gaps in documentation, helping you maintain accurate, up-to-date API contracts.