From the README

# apispec-mcp

An MCP server that lets AI agents explore and understand OpenAPI/Swagger specifications. Point it at any spec URL and use 11 tools to browse endpoints, schemas, auth, and generate examples — without the agent ever loading the raw JSON into context.

Supports Swagger 2.0, OpenAPI 3.0, and OpenAPI 3.1 (JSON or YAML).

## Quick start

No installation needed. Add this to your MCP client config and you're done.

### Cursor

Add to `.cursor/mcp.json`:

```json
{
  "mcpServers": {
    "apispec-mcp": {
      "command": "npx",
      "args": ["-y", "apispec-mcp"]
    }
  }
}
```

### Claude Desktop

Add to `claude_desktop_config.json`:

```json
{
  "mcpServers": {
    "apispec-mcp": {
      "command": "npx",
      "args": ["-y", "apispec-mcp"]
    }
  }
}
```

### Other MCP clients

Any client that supports stdio MCP servers can run it with:

```bash
npx apispec-mcp
```

## Usage

Once configured, tell the agent to load a spec — it will prompt you for the URL:

> Load the API spec