Why valid traffic can still be dangerous

Most API attacks don’t fail authentication.

They authenticate successfully — valid token, valid schema, a request that passes every gateway rule — and then do something they shouldn’t. By the time it’s obvious, it’s buried under forty alerts that all looked equally urgent.

The gap isn’t data

Teams running APIs in production already collect everything: logs, metrics, gateway telemetry, dashboards. The bottleneck isn’t collection. It’s conviction — knowing which of those forty alerts is the real attack or the real outage, and why.

Behaviour is the signal

A single token replayed across two continents in ten seconds. One IP quietly walking every endpoint in your catalogue. An API key whose call volume jumps 5× its own baseline overnight. None of these fail validation. They’re only visible as behaviour over time.

That’s the shift: from “is this request valid?” to “is this behaviour normal?”

What we do about it

APIGuard watches production APIs for abuse, anomalies, and outages and sends one trustworthy alert per real problem — with the severity and the reason attached. Every detection maps to a rule you can read and tune. No black box deciding what pages you at 3am.

More notes soon.