Most breaches start on an asset nobody remembered was exposed. External attack surface testing continuously discovers everything you have facing the internet, then proves which of it an attacker could actually use. It is the first thing Planck Operator does, from a single seed.
Domains, subdomains, live hosts, open ports and services, cloud storage, and the assets missing from your asset register, rebuilt on every run.
For each asset, the reachable surface: endpoints, parameters, authentication flows, and API routes an attacker could touch.
The exposures that actually matter, chained and reproduced, so you fix the path an intruder would walk, not a queue of maybes.
The external surface is the part of your estate you control least and change most. A deploy exposes a new endpoint, a DNS record outlives the service it pointed at, a cloud resource is made public for a demo and never locked down. These appear between engagements, which is exactly when a yearly test cannot see them.
Planck Operator re maps and re tests the external surface continuously, so exposure from drift becomes a proven finding the week it appears.
It is the continuous discovery and testing of everything your organization exposes to the internet: domains, subdomains, hosts, ports, services, cloud storage, and forgotten assets. It answers the question an attacker asks first, which is what can I even reach.
Attack surface management discovers and monitors the external footprint. External attack surface testing goes a step further and proves which of those exposed assets are actually exploitable, with evidence, rather than just listing them.
That is the point. The agent rebuilds your inventory from a seed on every run, so a staging box left public, a subdomain pointing at a moved service, or a bucket made readable for a demo is discovered and tested, not missed.
Give us a seed domain and the agent will map your external surface and prove what an attacker could reach.