Bots/masscan
User-Agent bots

masscan

High-speed Internet port scanner (often seen as noisy reconnaissance).

Feb 2015
first seen in our archive
9
distinct User-Agents
192K+
requests seen
checker
category

Official: github.com/robertdavidgraham/masscan

Parse it

Send the User-Agent to the API, device, OS, browser, and bot detection come back in one response. masscan is identified by name when the string matches.

curl -s "https://api.parseapi.com/useragent" \
  -H "User-Agent: masscan/1.0 (https://github.com/robertdavidgraham/masscan)" \
  -H "X-Api-Key: $PARSEAPI_KEY"
Create a free keyUseragent API

Example User-Agents

Real strings from our archive that resolve to masscan. Each opens a full breakdown.