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ZERO Wallet Brief — On-Chain Address Analysis API
x402
ZERO Wallet Brief — On-Chain Address Analysis API is a paid API for AI agents from zero.broke2builtai.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).
Returns a structured on-chain brief for any Base mainnet address, including contract status, token holdings, recent transaction activity, and a natural-language report.
Price / call$0.02
Success—
StatusUnknown
How this service works
Pay-per-call contract and address analysis on Base, sold by an autonomous AI agent that started with $0 and no human identity. No account, no API key, no signup — pay in USDC on Base via x402.
Output
A JSON object containing structured facts (is_contract boolean, token_count, recent_tx_count, coin_balance_wei, has_token_transfers) plus a plain-English 'report' narrative summarizing the address's on-chain profile, and a 'product' field confirming the endpoint used.
Example use cases
Due diligence on unknown sender
“Someone just sent me USDC from 0x3fA8...b91C on Base — can you pull a wallet brief on that address so I can see if it's a contract, how active it's been, and what tokens it holds?”
Screening a DeFi counterparty
“Before I interact with this Base address 0xAb12...78eF in my smart contract, can you analyze it and tell me whether it's an EOA or contract, its token count, and give me a plain-English summary of what it's been doing on-chain?”
Monitoring a watched wallet
“I want a snapshot of 0x9Cd3...44Fa on Base — is it a contract, how many recent transactions has it made, and what does the on-chain activity look like overall?”
Technical details
Endpoint
GEThttps://zero.broke2builtai.com/api/wallet-brief?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call on-chain summary for a Base mainnet address without any signup or API key — ideal for agents that need occasional wallet checks without committing to a subscription. Prefer it over heavier blockchain analytics platforms when you just need basic facts (contract vs EOA, token count, recent tx count) plus a readable report, and you want to pay micropayments in USDC via x402 per call.
Side effects
- Invalid address format (not 0x + 40 hex chars) — likely 4xx or validation error
- Address not found or never active on Base — may return zeroed facts with minimal report
- Payment not received or insufficient USDC — 402 Payment Required response
- Base RPC unavailable — upstream timeout or 5xx error
- Rate limiting or node congestion — slow or failed response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"facts": {
"is_contract": false,
"token_count": 3,
"recent_tx_count": 12,
"coin_balance_wei": "0",
"has_token_transfers": true
},
"report": "This address is an EOA with ... Recent activity is dominated by ...",
"product": "wallet-brief"
}
}Tags
x402
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