lion-x402-guard 🦁🛡️

One import to make any Base agent fail-closed on unsafe tokens. Wraps every token decision with LION's attested SafetyStack (honeypot + liquidity + risk + OFAC) in one keyless $0.012 x402 call.

import { lionGuard } from "lion-x402-guard";
const guard = lionGuard({ privateKey: process.env.PRIVATE_KEY! });

if (await guard.isSafe("0xToken")) await buy("0xToken");        // gate (fail-closed)
const safeBuy = guard.wrap((t: string) => buy(t));              // or wrap your action
await safeBuy("0xToken");                                       // throws GuardBlocked if unsafe

• Fail-closed: any error, any BLOCK verdict, or no valid token → go:false / throws. Never silently proceeds.
• Attested: each decision carries an Ed25519 signature you can verify offline.
• Cheap: up to 5 tokens per $0.012 call; keyless USDC on Base, no API keys.
• Pluggable logging: pass { log } to fan decisions to a file / Slack / pager.

Install: npm i lion-x402-guard x402-fetch viem · Discover LION: https://lionx402.com/api/mcp