# OpenAPI Transformer

> Use this tool when you need to integrate AI assistants with REST APIs or transform OpenAPI specifications into a standardized interface for AI interaction. It solves the problem of custom integration code by dynamically generating tools from API endpoints, handling authentication and request/response formatting. The tool takes OpenAPI documents as input and outputs a Model Context Protocol server, enabling seamless interaction between AI assistants and REST APIs.

Canonical page: https://skillsregistry.net/skills/th-ad-openapi-transformer  
JSON: https://api.skillsregistry.net/v1/skills/th-ad-openapi-transformer

## Description

The oas-to-mcp server transforms any OpenAPI specification into a Model Context Protocol server, enabling AI assistants to interact with REST APIs through a standardized interface. It dynamically generates tools from API endpoints, handling parameter mapping, authentication, and request/response formatting automatically. The implementation parses OpenAPI documents from URLs or local files, creates appropriate tool schemas based on endpoint parameters and request bodies, and manages the execution of API calls when tools are invoked. This bridge between OpenAPI and MCP makes any documented API instantly accessible to AI assistants without requiring custom integration code.

## Trust

- **Trust score (0–1):** 0.65
- **Verification tier:** scanned
- **Last scanned:** 2026-09-02

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** security
- **Updated:** 2026-09-02

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/th-ad-openapi-transformer)
- **Repository:** <https://github.com/th-ad/oas-to-mcp>

## 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": "th-ad-openapi-transformer"
    }
  }
}
```

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