API Security
Shadow APIs and Why They Persist
2026-07-09 · 5 min read
A shadow API is an endpoint that serves production traffic but does not appear in your specification. They rarely appear maliciously. They appear because a deadline moved, a spec update was skipped, and the endpoint kept working.
The security consequence is uneven control coverage. Authentication, rate limiting, and logging are usually applied where the specification says an endpoint exists. Discovery closes that gap by comparing what is live against what is documented.
Treat detection as a signal to reconcile documentation, not just to patch. Endpoints removed from the spec but left running are the ones with the weakest controls.
See this in your own environment
ShieldCore monitors the assets you own and tells you when something changes.
Keep reading
- What Security Posture Management Actually Tells YouA practical explanation of posture scoring, what it covers, and where it stops.
- Building an Asset Inventory That Stays CurrentWhy spreadsheets fail as inventories, and what continuous discovery changes.
- Email Authentication Explained: SPF, DKIM, and DMARCHow the three records work together, and the most common misconfiguration.