{
  "openapi": "3.0.0",
  "servers": [
    {
      "url": "http://api.mydomain.com"
    }
  ],
  "info": {
    "title": "simple-api",
    "version": "0.1.0"
  },
  "paths": {
    "/hello": {
      "get": {
        "summary": "Returns a Hello world to the user",
        "responses": {
          "200": {
            "description": "A simple hello world!",
            "content": {
              "application/json; charset=utf-8": {
                "schema": {
                  "type": "object",
                  "properties": {
                    "message": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "message"
                  ]
                }
              }
            }
          }
        }
      }
    }
  }
}