AI
402Shield — AI Agent Payment Firewall
402Shield
Pre-execution security screening for autonomous AI agents. 402Shield checks proposed crypto payments and EVM transactions before execution and returns ALLOW, REVIEW or BLOCK with machine-readable risk scores, reasons and evidence. The production API is x402-native on Base mainnet and costs $0.05 USDC per decision.
Back to x402 service marketPreflight a proposed crypto payment or EVM transaction before execution. Returns a machine-readable ALLOW, REVIEW or BLOCK verdict with risk score, reasons and available evidence.
POST
https://four02shield.onrender.com/v1/decisionService information
- Provider
- 402Shield
- Category
- AI
- Uptime (30 days)
- 100%
- Avg response time (30 days)
- 376 ms
- Information updated
- Oct 8, 2026
Transactions · 30 days
- Volume
- 0 USDC
- Transactions
- 0
- Payer addresses
- 0
Based on Base USDC records and updated hourly. This does not represent fulfilled sales.
Service tags
security
x402
ai-agents
payment-security
transaction-risk
crypto
base
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