# OpenAPI

> Use this tool when you need to integrate AI assistants with RESTful APIs that follow the OpenAPI standard, solving problems of seamless interaction with multiple APIs and rapid prototyping. It takes OpenAPI specification URLs as input and generates MCP tools as output, supporting OpenAPI 3.0 and 3.1 in JSON and YAML formats. Use it in scenarios requiring flexibility and ease of use when interacting with various APIs.

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

## Description

This MCP server implementation provides a bridge to OpenAPI-specified services, enabling AI assistants to interact with any API that follows the OpenAPI standard. Developed by Ross Masters, it dynamically generates MCP tools from an OpenAPI specification URL, allowing for seamless integration with a wide range of RESTful APIs. Built with Python and leveraging libraries like FastAPI and openapi3-parser, the server focuses on flexibility and ease of use. It supports OpenAPI 3.0 and 3.1 specifications in both JSON and YAML formats. The implementation is particularly useful for scenarios requiring interaction with multiple APIs, rapid prototyping, or integration with existing OpenAPI-documented services.

## Trust

- **Trust score (0–1):** 1.00
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

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

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/rmasters-openapi)
- **Repository:** <https://github.com/rmasters/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": "rmasters-openapi"
    }
  }
}
```

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