# 4. Product Principles

x402guard is built on four principles.

### 4.1 Instant clarity

Single risk score, plain-language findings, clear recommendation.

### 4.2 Pay-per-scan

Security should be cheap and universal.

### 4.3 Agent-native

Agents can discover, pay, and use x402guard autonomously.

### 4.4 Open core

Open engine + proprietary premium intelligence.