Base Onchain Wallet Profile

x402

Base Onchain Wallet Profile is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Returns a comprehensive onchain profile for a Base network address including wallet age, first funder, contract type, ETH balance, recent transfers, top counterparties, and large USD transfers.

Price / call$0.01

Seller volume →—

Success—

StatusUnknown

How this service works

Who is this Base address? Wallet age (first transfer), first funder, contract or EOA, ETH balance and nonce, the latest transfers in and out (native, ERC-20, NFTs), top counterparties by count, and recent large transfers in USD (ETH, WETH, USDC, USDT), from Alchemy's transfer index.

Output

Returns a JSON object with: wallet age (first activity timestamp, direction, and transaction hash), account classification (EOA vs contract type, e.g. minimal proxy), current ETH balance and USD equivalent (via Chainlink price feed), nonce, first funder details (address, asset, amount, timestamp, tx hash), recent inbound and outbound transfer summaries by category (ERC-20, ERC-721, ERC-1155), top counterparty addresses by interaction count, and a list of recent large transfers (ETH, WETH, USDC, USDT) with USD values — all sourced from Alchemy's transfer index covering the newest 100 inbound and 100 outbound transfers.

Example use cases

Due diligence on a DeFi counterparty

“Before I send funds, can you check out this Base address 0xABCDEF1234567890abcdef1234567890ABCDEF12 — is it a contract or a regular wallet, how old is it, who first funded it, and have there been any large transfers in or out recently?”

Investigating a suspicious incoming transfer

“I just received ETH from 0x1985EA6E9c68E1C272d8209f3B478AC2Fdb25c87 on Base — can you tell me who this address is, how long it's been active, what kind of account it is, and who its top counterparties are?”

Profiling a Base NFT collector

“Can you give me a full profile of this Base wallet 0x944766f715b51967E56aFdE5f0Aa76cEaCc9E7f9 — I'm curious about its age, ETH balance, NFT transfer history, and the biggest USDC or USDT movements it's made?”

Technical details

Endpoint

GEThttps://onchaincheck.dev/base/wallet-profile?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a holistic onchain identity snapshot for a Base network address in a single call — combining wallet age, funding history, account type, balance, recent transfers, and counterparty data. Prefer it over per-field lookups when doing due diligence, risk assessment, or user profiling on Base. It is purpose-built for Base and uses Alchemy's transfer index for richer historical context than raw RPC calls provide.

Side effects

Invalid address format (not matching ^0x[0-9a-fA-F]{40}$) returns a validation error
Address with no on-chain activity may return empty or minimal profile
Alchemy index may not include all historical transfers for very old or high-volume wallets
ETH/USD price from Chainlink may be slightly delayed (noted in updatedAt field)
Large transfer list limited to ETH, WETH, USDC, USDT — other tokens not included
Payment failure (402) if USDC not provided or x402 protocol not supported by client

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "age": {
      "ageDays": 886.5,
      "firstDirection": "in",
      "firstActivityAt": "2024-05-19T17:46:01.000Z",
      "firstActivityTx": "0x5f454db47b81efe7131819debc259678524c550771a0262b9cb486d58b5ba799",
      "firstActivityBlock": 14675707
    },
    "chain": "base",
    "notes": "From Alchemy's transfer index: ETH (top-level only), ERC-20, ERC-721 and ERC-1155 transfers, zero-value ones excluded. Activity, counterparties and large transfers cover the newest 100 transfers in ea… (240 chars, truncated in this example)",
    "account": {
      "kind": "minimal proxy (often a smart-contract wallet)",
      "isContract": true,
      "nativeBalance": "7.554675633166555733",
      "nativeBalanceUsd": 18129.022
    },
    "address": "0x2211d1D0020DAEA8039E46Cf1367962070d77DA9",
    "activity": {
      "newestAt": "2026-10-23T05:32:03.000Z",
      "byCategory": {
        "erc20": 193,
        "erc721": 7
      },
      "moreHistory": true,
      "inboundScanned": 100,
      "oldestScannedAt": "2026-03-04T20:47:51.000Z",
      "outboundScanned": 100,
      "transfersScanned": 200
    },
    "nativeUsd": {
      "price": 2399.71,
      "source": "Chainlink ETH/USD",
      "symbol": "ETH",
      "updatedAt": "2026-10-23T05:32:25.000Z"
    },
    "firstFunder": {
      "at": "2024-05-19T17:46:01.000Z",
      "tx": "0x5f454db47b81efe7131819debc259678524c550771a0262b9cb486d58b5ba799",
      "asset": "ETH",
      "amount": 1,
      "address": "0x1985EA6E9c68E1C272d8209f3B478AC2Fdb25c87"
    },
    "largeTransfers": [
      {
        "at": "2026-06-11T18:24:41.000Z",
        "usd": 10000,
        "hash": "0x946b81e380e8efa4ba6e90b9eb22b76733b331a1613c5f540ff93d0ef0de8759",
        "asset": "USDC",
        "block": 47206467,
        "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "amount": 10000,
        "category": "erc20",
        "direction": "out",
        "counterparty": "0xf605767BB0636FE082B20b2999A6957e3c772378"
      },
      {
        "at": "2026-03-15T05:58:07.000Z",
        "usd": 1000,
        "hash": "0x980b5e79d2c9aca49de1b0dbed6303cbc76f1003eb463e04af3086839efb8540",
        "asset": "USDC",
        "block": 43382470,
        "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "amount": 1000,
        "category": "erc20",
        "direction": "out",
        "counterparty": "0x944766f715b51967E56aFdE5f0Aa76cEaCc9E7f9"
      }
    ],
    "recentTransfers": [
      {
        "at": "2026-10-23T05:32:03.000Z",
        "usd": null,
        "hash": "0xfa9eb05cc39d5837f798e4af956c2d5701e7caedb1ed870b8cc7719a79616adc",
        "asset": "ZORA",
        "block": 52972088,
        "token": "0x1111111111166b7FE7bd91427724B487980aFc69",
        "amount": 1.176424941,
        "category": "erc20",
        "direction": "in",
        "counterparty": "0xC8d077444625eB300A427a6dfB2b1DBf9b159040"
      },
      {
        "at": "2026-10-23T04:54:45.000Z",
        "usd": null,
        "hash": "0x86f49f84cfc339368a9e60506d1c5f53b22b7584dfd1e6e4a2785aa0230c70c0",
        "asset": "ZORA",
        "block": 52970969,
        "token": "0x1111111111166b7FE7bd91427724B487980aFc69",
        "amount": 38.73637901,
        "category": "erc20",
        "direction": "in",
        "counterparty": "0xC8d077444625eB300A427a6dfB2b1DBf9b159040"
      },
      {
        "at": "2026-10-23T04:54:27.000Z",
        "usd": null,
        "hash": "0x5355bc9bbc8e8979da09448fa944eb4b4712a3d6084b3b95f67b1dbc33bc3dd3",
        "asset": "ZORA",
        "block": 52970960,
        "token": "0x1111111111166b7FE7bd91427724B487980aFc69",
        "amount": 24.00175129,
        "category": "erc20",
        "direction": "in",
        "counterparty": "0xC8d077444625eB300A427a6dfB2b1DBf9b159040"
      },
      {
        "at": "2026-10-23T04:50:31.000Z",
        "usd": null,
        "hash": "0xe8bad3a06af40f1a147648bc858fe960d072e442cb149dc6d9dace021915b330",
        "asset": "STONKEX",
        "block": 52970842,
        "token": "0x5ab000ff9B9FfE0349CE5ffA5fD86f217C3680F5",
        "amount": 1.11299432,
        "category": "erc20",
        "direction": "in",
        "counterparty": "0x4Ee35c658b8032a7577096B60bd51Ae9909E4f98"
      },
      {
        "at": "2026-10-23T04:50:31.000Z",
        "usd": null,
        "hash": "0xe8bad3a06af40f1a147648bc858fe960d072e442cb149dc6d9dace021915b330",
        "asset": "SPCX",
        "block": 52970842,
        "token": "0xb2000000000000000000007b9fcbd005511aCBd5",
        "amount": 0.0000248,
        "category": "erc20",
        "direction": "in",
        "counterparty": "0x4Ee35c658b8032a7577096B60bd51Ae9909E4f98"
      }
    ],
    "topCounterparties": [
      {
        "sent": 0,
        "lastAt": "2026-10-23T05:32:03.000Z",
        "address": "0xC8d077444625eB300A427a6dfB2b1DBf9b159040",
        "received": 54,
        "transfers": 54
      },
      {
        "sent": 0,
        "lastAt": "2026-10-23T04:50:31.000Z",
        "address": "0x4Ee35c658b8032a7577096B60bd51Ae9909E4f98",
        "received": 30,
        "transfers": 30
      },
      {
        "sent": 10,
        "lastAt": "2026-07-11T15:40:17.000Z",
        "address": "0x5BADb0143f69015c5c86cbd9373474a9c8Ab713B",
        "received": 0,
        "transfers": 10
      },
      {
        "sent": 9,
        "lastAt": "2026-04-12T03:44:47.000Z",
        "address": "0x8a311D7048c35985aa31C131B9A13e03a5f7422d",
        "received": 0,
        "transfers": 9
      },
      {
        "sent": 5,
        "lastAt": "2026-10-14T10:11:49.000Z",
        "address": "0x940181a94A35A4569E4529A3CDfB74e38FD98631",
        "received": 0,
        "transfers": 5
      }
    ]
  }
}

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