openapi

Guide OpenAPI 3.x contract design and schema validation.

Updated Feb 6, 2026

Search Tags:#documentation #security #openapi #contracts #api-design #rest-api #schema-validation

Ready to run

npx skills add https://github.com/pointware/custom-marketplace --skill openapi-pointware

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: openapi
Source: https://github.com/pointware/custom-marketplace/tree/main/claude-plugins/api-guardian/skills/openapi
Command: npx skills add https://github.com/pointware/custom-marketplace --skill openapi-pointware

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Solves API contract ambiguity by guiding OpenAPI design and validation.

Core Features & Use Cases

OpenAPI Contract Design: Provide precise, machine-readable contracts with endpoints, schemas, and responses.
Schema Validation & Reuse: Ensure schemas are valid and reusable with references and components.
Use Case: Teams design, review, and maintain comprehensive OpenAPI specs across services.

Quick Start

Open a complete OpenAPI 3.x specification for a minimal user service with endpoints for create, retrieve, update, and delete operations.

Frequently Asked Questions about openapi

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

FAQPage Schema

How do I design a comprehensive OpenAPI specification for my REST API?▼

OpenAPI specifications provide machine-readable contracts that document endpoints, request/response schemas, and error handling. Start by defining your API's base paths, operations (GET, POST, PUT, DELETE), and reusable schema components, then validate compatibility with OpenAPI 3.x standards to ensure consistency across microservices.

What's the best way to validate and reuse schemas in OpenAPI specs?▼

Schema validation in OpenAPI uses component references to eliminate duplication and maintain consistency. Define schemas once in the components section, reference them across endpoints, and validate that all references conform to OpenAPI 3.x syntax so your contract remains single-source-of-truth for all consumers.

How do I document security schemes in an OpenAPI specification?▼

OpenAPI 3.x requires explicit security scheme definitions in the components section—supporting OAuth2, API keys, HTTP authentication, and other methods. Document which operations require which schemes, validate that all endpoints declare their security requirements, and ensure comprehensive coverage prevents unauthorized access ambiguity.

Can I use OpenAPI to enforce RESTful best practices across my microservices?▼

OpenAPI design patterns enforce consistency: standardized HTTP status codes, clear error response structures, consistent naming conventions, and proper use of HTTP verbs. Validate your specs against these patterns to catch design inconsistencies before implementation, reducing contract ambiguity across service boundaries.

What does API contract ambiguity mean and why does it matter?▼

API contract ambiguity occurs when specifications lack clarity on endpoints, data formats, error handling, or security, causing consumer confusion and integration failures. OpenAPI solves this by providing precise, machine-readable contracts that eliminate guesswork and standardize expectations across teams.

Does OpenAPI work with microservice architectures?▼

Yes, OpenAPI 3.x is designed for microservice scenarios, enabling each service to maintain its own specification while sharing reusable components and security schemes across the architecture, ensuring consistent contracts and reducing design drift.