{
  "id": "gtmetrix-monitor",
  "name": "GTmetrix",
  "operator": {
    "name": "GTmetrix",
    "url": "https://gtmetrix.com"
  },
  "description": "GTmetrix's page-performance testing agent. It loads a page in a real browser from a test server the customer selects, and records timings and audit results. GTmetrix publishes the addresses its test servers request from so that site owners can allow or disallow them in a firewall, or keep the traffic out of their analytics.",
  "docs": [
    "https://gtmetrix.com/locations.html"
  ],
  "category": "monitoring",
  "user_agents": {
    "patterns": [
      "GTmetrix"
    ],
    "instances": [
      "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 GTmetrix"
    ]
  },
  "behavior": {
    "respects_robots_txt": false
  },
  "verification": [
    {
      "type": "cidr_feed",
      "url": "https://gtmetrix.com/locations.txt",
      "format": "text_lines"
    }
  ],
  "tier": 1,
  "tier_label": "Fully verifiable",
  "first_seen": "2026-10-29T13:40:08.426Z",
  "resolved_cidrs": [
    "128.251.154.106/32",
    "130.131.80.25/32",
    "130.33.49.70/32",
    "130.33.73.187/32",
    "131.189.105.2/32",
    "135.13.24.38/32",
    "135.220.45.129/32",
    "135.224.6.121/32",
    "158.158.107.119/32",
    "158.158.99.142/32",
    "172.166.160.11/32",
    "172.166.197.132/32",
    "172.166.212.30/32",
    "172.167.157.85/32",
    "172.167.158.36/32",
    "172.167.37.236/32",
    "172.178.46.205/32",
    "172.178.69.75/32",
    "172.196.48.58/32",
    "172.204.26.89/32",
    "20.165.40.104/32",
    "20.175.103.203/32",
    "20.214.16.34/32",
    "20.214.40.188/32",
    "20.215.67.195/32",
    "20.255.152.94/32",
    "20.58.136.237/32",
    "20.66.104.166/32",
    "20.91.251.60/32",
    "4.150.24.180/32",
    "4.150.58.128/32",
    "4.151.153.232/32",
    "4.154.170.206/32",
    "4.155.232.126/32",
    "4.155.4.251/32",
    "4.155.83.118/32",
    "4.193.251.82/32",
    "4.194.210.160/32",
    "4.196.89.67/32",
    "4.201.153.91/32",
    "4.201.205.72/32",
    "4.211.187.66/32",
    "4.211.207.165/32",
    "4.221.169.10/32",
    "4.221.208.40/32",
    "4.223.126.117/32",
    "4.248.66.111/32",
    "4.255.141.203/32",
    "4.255.152.17/32",
    "52.140.18.69/32",
    "52.159.252.135/32",
    "52.175.27.162/32",
    "68.155.155.192/32",
    "68.155.155.195/32",
    "68.211.125.30/32",
    "68.211.125.58/32",
    "74.225.139.157/32",
    "74.225.217.56/32",
    "74.243.247.23/32",
    "74.243.249.73/32",
    "74.248.16.154/32",
    "85.211.254.103/32",
    "85.211.254.91/32",
    "98.71.220.188/32"
  ]
}