[
  {
    "idx": 1,
    "url": "https://www.surveymonkey.com/r/SVV6CQ7",
    "ok": false,
    "error": "HTTP 404"
  },
  {
    "idx": 2,
    "url": "http://some.ops4devs.info/",
    "ok": false,
    "error": "HTTP 503"
  },
  {
    "idx": 3,
    "url": "https://dzone.com/articles/aws-lambda-performance-and-cold-starts",
    "ok": true,
    "error": null
  },
  {
    "idx": 4,
    "url": "https://engineering.klarna.com/four-load-testing-mistakes-developers-love-to-make-68b443f7e8a2",
    "ok": false,
    "error": "HTTP 403"
  },
  {
    "idx": 5,
    "url": "https://honeycomb.io/blog/2017/01/instrumentation-worst-case-performance-matters/",
    "ok": true,
    "error": null
  },
  {
    "idx": 6,
    "url": "https://blog.docker.com/2017/01/infrakit-hood-high-availability/",
    "ok": true,
    "error": null
  },
  {
    "idx": 7,
    "url": "http://shouldiblockicmp.com/",
    "ok": true,
    "error": null
  }
]