Which OpenAPI versions are supported?

The tool supports OpenAPI Specification versions 2.0 (Swagger), 3.0, and 3.1.

Can I see which schemas are used most often?

Yes, the walk_refs tool returns unique reference targets ranked by count, allowing you to identify the most critical data models in the API.

Can this skill handle very large OpenAPI files?

Yes, it includes specific strategies for large APIs such as tag-based filtering, paging with offsets, and component-only schema views to keep the information manageable.

How do I find a specific endpoint in a deeply nested API?

You can use path filtering with double-asterisk patterns, like '/api/**/users', to match resources across multiple path depths.

API Specification Explorer

Name: API Specification Explorer
Author: erraggy

byerraggy

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API Development

Navigates and analyzes OpenAPI specifications to understand complex API structures, endpoints, and data models.

The API Specification Explorer is a specialized toolset for Claude Code designed to parse and navigate comprehensive OpenAPI (OAS) documents. It enables developers to quickly grasp the scope of an API, filter through hundreds of endpoints using tags or path patterns, and map out underlying data models with surgical precision. By providing structured ways to drill into security schemes, parameters, and reference chains, it helps users understand unfamiliar APIs or audit existing ones without being overwhelmed by massive specification files.

Key Features

01Advanced operation filtering by tag, HTTP method, or glob-style path patterns

02Reference tracing to identify core data models and analyze usage impact

03Deep-dive extraction of specific parameters, response headers, and security schemes

04High-level API overview including OAS version, operation counts, and server URLs

052 GitHub stars

06Smart schema exploration with component filtering to reduce inline noise

Use Cases

01Analyzing the impact of schema changes by tracing reference counts across the entire specification

02Rapidly onboarding onto a large, unfamiliar third-party API by exploring its resource groups

03Performing structural audits to identify deprecated endpoints or inconsistent schema patterns

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add erraggy/oastools explore-api

For use in Claude.ai and ChatGPT

Download Skill