# PhantomJS / Nightmare

Bot · Automation tools · Collects data · operated by legacy

**Identity:** Names itself in its user agent only.

## How to recognise it

- User agent contains `PhantomJS`
- Leaves automation traces in the page’s JavaScript globals

## With Double Agent

Sessions from PhantomJS / Nightmare are labelled `bot` with `agent_id: legacy.headless`, and tagged in your analytics. Nothing is blocked unless you choose to. Install: https://doubleagent.so/install.md

Source: https://github.com/monperrus/crawler-user-agents