This repository contains a list of of HTTP user-agents used by robots, crawlers, and spiders. I regularly maintain this list based on my own logs.

If you are using Ruby, Voight-Kampff and isbot provide libraries for accessing this data.

Other systems for spotting robots, crawlers, and spiders that you may want to consider include isBot (Node.JS), Crawler-Detect (PHP), BrowserDetector (PHP), and browscap (JSON files).

License

The list is under a MIT License. The versions prior to Nov 7, 2016 were under a CC-SA license.

Contributing

I do welcome additions contributed as pull requests.

The pull requests should:

• contain a single addition
• specify a discriminant relevant syntactic fragment (for example "totobot" and not "Mozilla/5 totobot v20131212.alpha1")
• contain the pattern (generic regular expression), the discovery date (year/month/day) and the official url of the robot
• result in a valid JSON file (don't forget the comma between items)

Example:

{
  "pattern": "rogerbot",
  "addition_date": "2014/02/28",
  "url": "http://moz.com/help/pro/what-is-rogerbot-"
}

--Martin