API security cannot stop at the gateway.

A gateway guards the edge. Calls between your internal services never pass through it. Greymatter runs beside your internal APIs. They check callers, cap floods, and record the calls that leave.

The biggest API attacks, met one by one.

Leah Chen runs API security at a payments company. Forty partners call its payment APIs every day. Here is how each attack plays out, and what Greymatter does about it.

Production Platform 88 svc · 12 ns Filter WAF by namespace, service or rule ▲ 6 degraded● 747 healthy

Blocked, only if you say soSTEP 4 OF 4

Anomaly scoring◆ Detection only

CRITICAL

5

ERROR

4

WARNING

3

NOTICE

2

SecAction "id:900110,phase:1,pass, setvar:tx.inbound_anomaly_score_threshold=5, setvar:tx.outbound_anomaly_score_threshold=4"

score 9 · threshold 5▲ Would have been blocked

Greymatter secures API traffic at three points: as it comes in from outside, as your internal apps call each other, and as data heads out. The platform verifies each caller, catches known break-in methods, caps traffic floods, and shows where data goes. All of it runs from one console.

Greymatter places a checkpoint beside each app, so internal API calls get the same scrutiny as outside traffic. Each app proves its identity over an encrypted connection before another app accepts the call. With identity enforcement on, each service admits only the callers it learned, plus the grants your team writes. A compromised app is refused by every service it never called.

Greymatter includes an App, API & AI Gateway, then adds identity verification, a web application firewall, traffic limits, and outbound controls inside your network. Teams get API security from entry to exit without stitching separate tools together.

Yes. Greymatter shows every outbound call by name and flags sensitive data, such as card numbers, in requests and replies. Detection records and alerts. It does not block the call.