Python's default User Agent for Requests is Python-requests/x.y.z, where x.y.z represents the Requests' version.
python-requests/2.28.2
Go-http-client/2.0
Go-http-client/1.1
Curl sends its User-Agent string to the server in the following format: curl/version.number.
curl/7.54.1
Wget/1.12 (linux-gnu)
Microsoft-CryptoAPI/10.0
CertUtil URL Agent
Mozilla/5.0 [en] (X11, U; OpenVAS-VT 9.0.1)
idz6pd8f6rzyxnh910b6rb3wdnjhi5bt6gw4l.burpcollaborator.net 7.7.2 rv:4794 (iPhone; iPhone OS 9.3.3; en-US)
http://sea8arhlbaq5k78x700splotuk0gohh57tzgq4f.burpcollaborator.net/6.17.0.RELEASE iPhone12,8 iOS/14.5.1))
Mozilla/5.0 (compatible; archive.org_ClamAV/8.0.3 +http://www.loc.gov/webcrawler/bot.php)
Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36