# OpenAPI

> Use this tool when you need to interact with REST APIs defined by OpenAPI 3.x specifications, and convert them into callable tools with robust security and authentication features. It solves problems of API integration, security, and observability by providing features like authentication methods, security policy engine, and runtime response validation. It takes OpenAPI specifications as input and outputs callable tools with support for various transport options and metrics.

Canonical page: https://skillsregistry.net/skills/haasonsaas-openapi  
JSON: https://api.skillsregistry.net/v1/skills/haasonsaas-openapi

## Description

Converts OpenAPI 3.x specifications into callable tools, enabling interaction with any REST API that has an API definition. Supports API key, Bearer, Basic, and OAuth2/OpenID Connect authentication methods. Includes a security policy engine with tool allowlists and denylists, host restrictions, and method filtering. Provides runtime response validation through Zod and AJV schema checking, Prometheus metrics for observability, and multiple transport options including stdio, streamable-http, and SSE.

## Trust

- **Trust score (0–1):** 0.95
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** monitoring
- **Updated:** 2026-09-28

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/haasonsaas-openapi)
- **Repository:** <https://github.com/evalops/mcp-openapi>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "haasonsaas-openapi"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/haasonsaas-openapi` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/haasonsaas-openapi/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt