Base Chain Address Lookup

x402

Base Chain Address Lookup is a paid API for AI agents from hubvibe-io.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-27).

Returns ETH balance, transaction count, and account type (contract vs EOA) for a single Base mainnet address in one call

Price / call$0.05

Seller volume →—

Success—

StatusUnknown

How this service works

Base wallet lookup / address balance: ETH balance, transaction count (nonce) and whether the address is a smart contract or an ordinary wallet (EOA), live from Base mainnet in one call. Use it to check a counterparty, deposit address or contract before paying it. Input: address (0x...). For token balances or any other read use chain.rpc.

Output

Returns three aggregated chain-read values for the given Base mainnet address: (1) current ETH balance, (2) total transaction count (nonce), and (3) a flag indicating whether the address is a smart contract or an externally owned account (EOA).

Example use cases

Wallet due-diligence before a transfer

“Before I send funds, can you check 0x4838B106FCe9647Bdf1E7877BF73cE8B0BAD5f97 on Base — how much ETH it holds, how many transactions it's done, and whether it's a contract or a real wallet?”

Verify a counterparty's on-chain activity

“I'm about to work with someone who gave me their Base address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — can you pull their ETH balance and transaction count so I can see if they're an active user?”

Detect smart contract addresses in a list

“Is the address 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD on Base a smart contract or a regular externally owned account? Also grab its ETH balance and tx count.”

Technical details

Endpoint

POSThttps://hubvibe-io.com/work/chain/address?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a quick, consolidated snapshot of a Base mainnet address — especially when you need all three data points (balance, tx count, account type) and want to avoid making three separate RPC calls. Ideal for due-diligence checks, wallet validation, and contract-detection workflows where cost ($0.05/call) is acceptable for the convenience of a single aggregated response.

Side effects

Invalid or malformed address (not 0x-prefixed or wrong length) — likely returns a 400-level error
Address not found or never used on Base — may return zero values for balance and tx count
Base RPC node unavailability or timeout — may return 5xx error
Payment failure or insufficient USDC balance — x402 payment error before the call is processed

Input

Schema · Request body

Field	Type	Description
address	string
language	string

Output

Schema · Response

{
  "type": "json",
  "example": {
    "result": {
      "address": "0x837C40E2B4e976f43Ffb4451eE281A00fA9477dd",
      "network": "base-mainnet",
      "balance_eth": 1.25,
      "balance_wei": "1250000000000000000",
      "is_contract": false,
      "code_size_bytes": 0,
      "transaction_count": 42
    },
    "status": "ok",
    "worker": "chain.address",
    "price_usd": 0.05,
    "provenance": {
      "steps": [
        {
          "ms": 640,
          "ok": true,
          "step": "address",
          "provider": "base_rpc"
        }
      ],
      "attempts": 1,
      "elapsed_ms": 660,
      "providers_used": [
        "base_rpc"
      ]
    },
    "receipt_id": "rcpt_9f1c2b3a4d5e6f70",
    "receipt_url": "/work/receipts/rcpt_9f1c2b3a4d5e6f70"
  }
}

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