The Calibre Agent

When Calibre analyses your Site, it uses a custom analytics suite, powered by Google Chrome browser in a clean room environment.

Tests are run with cache turned off, with no other known network activity, on dedicated hardware. Our agents autoscale to meet demand, and will never leave you waiting for tests to complete.

Recognising the Calibre Agent

All requests made by the Agent originate from one of our dedicated IP addresses. This can be useful if you’d like to bypass user authentication or allow Calibre to view a staging site.

Agent IP Addresses

IP Addresses may change from time to time. We recommend using automation where possible.
LocationAPI LocationTagIP Address
🇺🇸 North Virginia, USANorthVirginia52.206.10.99
🇸🇬 SingaporeSingapore13.229.179.153
🇮🇳 Mumbai, IndiaMumbai52.66.138.107
🇯🇵 Tokyo, JapanTokyo13.115.202.63
🇧🇷 São Paulo, BrazilSaoPaulo52.67.68.61
🇰🇷 Seoul, KoreaSeoul13.125.97.18
🇺🇸 Ohio, USAOhio18.218.2.213
🇨🇦 Central CanadaCanada35.182.148.199
🇺🇸 Oregon, USAOregon34.215.172.173
🇮🇪 IrelandIreland52.212.252.70
🇦🇺 Sydney, AustraliaSydney54.79.69.167
🇺🇸 Northern California, USACalifornia54.177.66.94
🇬🇧 London, United KingdomLondon35.176.185.182
🇩🇪 Frankfurt, GermanyFrankfurt35.156.32.45
🇸🇪 Stockholm, SwedenStockholm13.51.34.125
🇧🇭 BahrainBahrain15.184.93.28
🇿🇦 Cape Town, South AfricaCapeTown13.244.178.74

You can also get Agent IP Addresses from the following sources:

  1. Agent JSON Endpoint.
  2. Calibre’s command line client has a calibre location-list command.
  3. The Node.js API exports a Agent.list() function.

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