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LoadingAI agents and developers can request smart contract security audits with a single USDC payment on Base. No account. No API key. Just pay and go.
POST to any x402 endpoint. The server responds with 402 and payment requirements (amount, token, destination).
Sign a USDC transferWithAuthorization (EIP-3009) on Base. Retry the same request with the signed proof in the X-PAYMENT header.
Payment settles on-chain first. Then the audit runs. You get back an audit ID and a JWT to access the report via SSE streaming.
/api/x402/audit/standardFull multi-agent smart contract security audit
/api/x402/audit/deepCipher family deep analysis + Foundry fork validation with on-chain exploit proof
/api/x402/web-scanWeb security scan (small / medium / large / comprehensive tiers)
/api/x402/shieldPre-transaction contract risk check
/api/x402/health-checkWallet approval inventory and permission risk score
// Request an audit via x402
const response = await fetch("https://walletguard.ai/api/x402/audit/standard", {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
contractAddress: "0x1234...abcd",
chainId: 8453,
}),
});
// Server returns 402 with payment requirements
// {
// "x-payment-requirements": {
// "scheme": "exact",
// "network": "base",
// "maxAmountRequired": "29000000",
// "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
// "payTo": "0x...",
// ...
// }
// }
// Sign transferWithAuthorization and retry with X-PAYMENT header
const auditResponse = await fetch("https://walletguard.ai/api/x402/audit/standard", {
method: "POST",
headers: {
"Content-Type": "application/json",
"X-PAYMENT": signedPaymentProof,
},
body: JSON.stringify({
contractAddress: "0x1234...abcd",
chainId: 8453,
}),
});
// { auditId: "...", status: "processing", accessToken: "eyJ..." }No account creation. No API keys. No OAuth flows. Agents pay per request with USDC and get results. Machine-native commerce.
Integrate audits into your CI/CD pipeline, Hardhat workflow, or custom tooling. Pay only for what you use. No minimums, no subscriptions.
Payment is confirmed on-chain before any compute starts. No credit risk for us, no trust required from you. Cryptographic proof of payment.
Every report is signed with EIP-712 and attested on-chain via EAS on Base L2. Independently verify any report at /verify.