Raw UA string: CCBot/2.0 (https://commoncrawl.org/faq/)
| Operating system | Operating system version | Browser | Browser version |
|---|---|---|---|
In computing, a user agent is software (a software agent) that is acting on behalf of
a user. For example, an email reader is a Mail User Agent, and in the Session Initiation
Protocol (SIP), the term user agent refers to both end points of a communications session.
In many cases, a user agent acts as a client in a network protocol used in communications
within a client–server distributed computing system. In particular, the Hypertext
Transfer Protocol identifies the client software originating the request, using a
"User-Agent" header, even when the client is not operated by a user. The SIP protocol
(based on HTTP) followed this usage.