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Sumeria Base Counterparty Profile
x402
Sumeria Base Counterparty Profile is a paid API for AI agents from x402.sumeria.ar, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-27).
Returns a blockchain profile for a Base address including account type, nonce, ETH and USDC balances, and 7-day USDC flow statistics, to help evaluate unknown payees before sending funds.
Price / call$0.01
Success—
StatusUnknown
How this service works
Perfil de contraparte en Base: tipo (EOA, EOA con EIP-7702 o contrato), nonce, saldos de ETH y USDC, y flujo de USDC de los últimos 7 días (recibido, enviado, contrapartes y pagadores distintos). Hechos con número de bloque, sin puntajes. Útil antes de pagarle a un payTo desconocido.
Output
Returns a JSON object containing the address's account type (EOA, EOA with EIP-7702, or contract), current nonce, ETH balance, USDC balance, total USDC received in last 7 days, total USDC sent in last 7 days, count of distinct counterparties and distinct payers, all anchored to a specific block number for auditability. No reputation scores — only on-chain facts.
Example use cases
Vetting an unknown payment recipient
“I need to pay out to 0xABCDEF1234567890abcdef1234567890ABCDEF12 on Base but I've never dealt with them before — can you check their account type, balances, and recent USDC flow so I can decide if it's safe?”
Freelancer wallet due diligence
“A freelancer gave me their Base wallet 0x9f8e7d6c5b4a3210fedcba9876543210fedcba98 to pay their invoice — can you look up whether it's a real EOA, what its USDC balance is, and how active it's been in the last week?”
Detecting suspicious payTo address
“My app is about to send USDC to 0x1111222233334444555566667777888899990000 on Base — can you quickly check if that address looks like a contract or a normal wallet, and show me its 7-day USDC inflow and outflow stats before we proceed?”
Technical details
Endpoint
GEThttps://x402.sumeria.ar/v1/base/perfil/:direccion?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need objective, on-chain facts about a Base address before initiating a payment — particularly for unknown payees. It is ideal for pre-payment due diligence because it provides account type classification, balance snapshot, and 7-day USDC flow without subjective scoring. Prefer this over generic blockchain explorers when you need structured, machine-readable output ready for agent decision-making.
Side effects
- Invalid or malformed Ethereum address returns a 400 error
- Address not found or never used on Base may return zero balances with minimal data
- RPC or node connectivity issues may cause timeouts or 503 errors
- Rate limiting or payment failure (x402) results in 402 Payment Required
- Very new addresses with no transaction history return zeros across flow metrics
Tags
x402
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