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Quack AI Q402 Agent Trust Monitor
x402
Quack AI Q402 Agent Trust Monitor is a paid API for AI agents from q402.quackai.ai, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-15).
Fetches on-chain reputation, identity registration, and recent activity data for an EVM wallet address to assess its trustworthiness before sponsoring gasless transactions.
Price / call$0.15
Success—
StatusUnknown
How this service works
Q402 is a gasless payment protocol for EVM chains. Your users pay zero gas. You sponsor it, invisibly and instantly.
Output
Returns a JSON object containing: ERC-8004 identity registration status (checked on BSC and Base), on-chain transaction count bucket for the address (e.g. '10-49'), whether recent activity was detected in the last 900 blocks (~30 min) on Base mainnet, a reputation field (may be null), a payment receipt ID, the price paid in USDC, and the timestamp of the lookup.
Example use cases
Pre-sponsorship wallet vetting
“Before I whitelist this wallet 0xAbC123...def for gasless transactions in my dApp, can you pull its agent trust profile — check if it's registered in any identity registry and how many transactions it's had on Base in the last 30 minutes?”
Fraud detection for airdrop eligibility
“I'm running an airdrop and want to filter out low-quality wallets — can you check the on-chain activity and ERC-8004 registration status for 0x3f5CE5FBFe3E9af3971dD833D26bA9b5C936f0bE to see if it looks like a real user?”
Agent fleet trust scoring
“My AI agent just received a request from wallet 0x71C7656EC7ab88b098defB751B7401B5f6d8976F — can you fetch its trust profile from Q402 to see its reputation, recent Base activity, and whether it's identity-registered before I let it proceed?”
Technical details
Endpoint
GEThttps://q402.quackai.ai/api/x402/agent-trust/%7Baddress%7D/monitorWhen to prefer
Choose this endpoint when you need to assess the trustworthiness of an EVM wallet address before sponsoring gasless transactions or granting access to on-chain services. It combines ERC-8004 identity registry checks across BSC and Base with recent on-chain activity analysis in a single call, making it ideal for anti-fraud, airdrop eligibility, or agent authorization workflows on EVM chains. Prefer it over generic blockchain explorers when you need structured reputation data with a gas sponsorship context.
Side effects
- Invalid or malformed EVM address returns an error or empty result
- Address not found on-chain returns null reputation and empty ERC-8004 registrations
- RPC timeout or Base mainnet unavailability may cause incomplete on-chain activity data
- Payment failure (insufficient USDC balance) prevents the call from completing
- Rate limiting may occur under high call volume
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"paidAt": "2026-08-19T05:00:00.000Z",
"address": "0x70997970C51812dc3A010C7d01b50e0d17dc79C8",
"erc8004": {
"source": "ERC-8004 IdentityRegistry — BSC (0x8004A169FB4a3325136EB29fA0ceB6D2e539a432) and Base queried",
"isRegistered": false,
"registrations": []
},
"receipt": "atx_c5d6e7f8a9b0c1d2e3f4a3b4",
"priceUsdc": 0.15,
"reputation": null,
"onChainActivity": {
"source": "Base mainnet eth_getTransactionCount (public RPC; scan window 900 blocks ≈ 30 min)",
"txCountBucket": "10-49",
"recentActivityDetected": false,
"recentActivityWindowBlocks": 900
}
}
}Tags
x402
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