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Ethereum Onchain Data – Wallet Profile
x402
Ethereum Onchain Data – 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 an Ethereum address: wallet age, first funder, EOA/contract type, ETH balance, recent transfers (native/ERC-20/NFT), top counterparties, and large USD transfers.
Price / call$0.01
Success—
StatusUnknown
How this service works
Who is this Ethereum 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
A JSON object containing: wallet age in days and first activity timestamp/tx/block; account kind (EOA, contract, EIP-7702 delegation target); current ETH balance and USD value; nonce; first funder address, amount, asset, and timestamp; activity breakdown by category (external, internal, ERC-20, ERC-721, ERC-1155); list of recent transfers with direction, counterparty, asset, amount, and USD value; list of large transfers in USD; Chainlink ETH/USD price and update time; and a notes field explaining data source and scan limits.
Example use cases
Due diligence on a counterparty wallet
“I'm about to send a large payment to 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B — can you pull their Ethereum profile and tell me how old the wallet is, who first funded it, and what their recent large transfers look like?”
Investigating a whale wallet's activity
“Look up the Ethereum wallet profile for 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 and summarize their recent transfer history, top counterparties, and any large USDC or ETH moves in the last few months.”
Checking if an address is a smart contract
“Is 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D on Ethereum a regular wallet or a smart contract? Also give me its ETH balance and nonce.”
Technical details
Endpoint
GEThttps://onchaincheck.dev/eth/wallet-profile?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a rich, multi-dimensional Ethereum wallet profile in a single call — combining wallet age, funding history, balance, account type, and recent transfer activity. Prefer this over raw RPC calls when you need human-readable context, USD valuations, and Alchemy's indexed transfer history rather than just a balance check. It is especially well-suited for due diligence, whale research, and onboarding checks where you need to quickly understand an address's history and behavior.
Side effects
- Invalid Ethereum address format (must match ^0x[0-9a-fA-F]{40}$) — returns 400/validation error
- Address not found or has zero activity — returns empty activity fields
- Alchemy index lag may cause recent transfers to be slightly delayed
- Only the newest 100 inbound and 100 outbound transfers are scanned; older history may be missing
- USD values are null for non-priced assets (e.g. arbitrary ERC-20s or ERC-1155s without known price)
- Payment required error (402) if x402 payment header is missing or USDC payment fails
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"age": {
"ageDays": 4042.9,
"firstDirection": "in",
"firstActivityAt": "2015-09-28T08:24:43.000Z",
"firstActivityTx": "0x9b629147b75dc0b275d478fa34d97c5d4a26926457540b15a5ce871df36c23fd",
"firstActivityBlock": 302086
},
"chain": "eth",
"notes": "From Alchemy's transfer index: ETH (including internal), ERC-20, ERC-721 and ERC-1155 transfers, zero-value ones excluded. Activity, counterparties and large transfers cover the newest 100 transfers i… (240 chars, truncated in this example)",
"account": {
"kind": "wallet (EOA) with EIP-7702 delegation",
"nonce": 5969,
"isContract": false,
"delegatesTo": "0x5A7FC11397E9a8AD41BF10bf13F22B0a63f96f6d",
"nativeBalance": "5.773252986299759339",
"nativeBalanceUsd": 13856.349
},
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"activity": {
"newestAt": "2026-10-22T22:08:47.000Z",
"byCategory": {
"erc20": 167,
"erc721": 7,
"erc1155": 2,
"external": 21,
"internal": 3
},
"moreHistory": true,
"inboundScanned": 100,
"oldestScannedAt": "2026-07-16T09:03:47.000Z",
"outboundScanned": 100,
"transfersScanned": 200
},
"nativeUsd": {
"price": 2400.09,
"source": "Chainlink ETH/USD",
"symbol": "ETH",
"updatedAt": "2026-10-23T05:33:59.000Z"
},
"firstFunder": {
"at": "2015-09-28T08:24:43.000Z",
"tx": "0x9b629147b75dc0b275d478fa34d97c5d4a26926457540b15a5ce871df36c23fd",
"asset": "ETH",
"amount": 0.25,
"address": "0x1Db3439a222C519ab44bb1144fC28167b4Fa6EE6"
},
"largeTransfers": [
{
"at": "2026-09-26T05:13:47.000Z",
"usd": 2400.0939,
"hash": "0x43273aba0b69d02e177b1b9372d219a1256e61e6be329a489f2b16274bad55a7",
"asset": "ETH",
"block": 26059466,
"token": null,
"amount": 1,
"category": "external",
"direction": "out",
"counterparty": "0xE731dFadBFf20542E10D09D26Fc71445C70d4232"
}
],
"recentTransfers": [
{
"at": "2026-10-22T22:08:47.000Z",
"usd": null,
"hash": "0x84dedfb103bde6514e86f63a61b4f61d00e223eb1c9fffcb540e534b0f352915",
"asset": null,
"block": 26251047,
"token": "0x50a76D644ccD4B3E2cA0169Fe52F0eD0292CeE58",
"amount": null,
"category": "erc1155",
"direction": "in",
"counterparty": "0x17628F8F3d65e36f3f505795dF2D3bed7C26E5C0"
},
{
"at": "2026-10-22T14:10:59.000Z",
"usd": null,
"hash": "0xe14d795ebfe2835e584837fcda4509dc27e223111c5955e9748144a999d8175c",
"asset": "ZC",
"block": 26248667,
"token": "0xe41025A68D37a98ad672431908485Eb2f885A553",
"amount": 10000000,
"category": "erc20",
"direction": "in",
"counterparty": "0x0000000000000000000000000000000000000000"
},
{
"at": "2026-10-22T07:14:47.000Z",
"usd": null,
"hash": "0x4046bbc92e51e8b11c3dff049ddfba1dbae41153b2b57d44c8578b5b6c5ba12e",
"asset": null,
"block": 26246595,
"token": "0x53EDeacdA5167731d830F6e9FC17d365F5070060",
"amount": null,
"tokenId": "1617",
"category": "erc721",
"direction": "in",
"counterparty": "0x81f9C853d7CC894F7EF742F62a265a5e9aeeB727"
},
{
"at": "2026-10-22T07:14:11.000Z",
"usd": null,
"hash": "0x395bfb51000b790fd1aee8da5197203499aee3dea557ee96cb8dd2084120f964",
"asset": null,
"block": 26246592,
"token": "0x53EDeacdA5167731d830F6e9FC17d365F5070060",
"amount": null,
"tokenId": "1598",
"category": "erc721",
"direction": "in",
"counterparty": "0x81f9C853d7CC894F7EF742F62a265a5e9aeeB727"
},
{
"at": "2026-10-22T07:13:47.000Z",
"usd": null,
"hash": "0xdac2be32fec346dea79dc0e855c875656d09475848276790f474a8929a31df4e",
"asset": null,
"block": 26246590,
"token": "0x53EDeacdA5167731d830F6e9FC17d365F5070060",
"amount": null,
"tokenId": "1594",
"category": "erc721",
"direction": "in",
"counterparty": "0x81f9C853d7CC894F7EF742F62a265a5e9aeeB727"
}
],
"topCounterparties": [
{
"sent": 0,
"lastAt": "2026-10-22T01:09:59.000Z",
"address": "0x18Ce40bF88E38ffe57201dADe3cC88A415c2dbCf",
"received": 22,
"transfers": 22
},
{
"sent": 14,
"lastAt": "2026-07-25T17:57:11.000Z",
"address": "0xF5AfbFb2b9C0267D70c3eab03CDc872941aedBAA",
"received": 0,
"transfers": 14
},
{
"sent": 10,
"lastAt": "2026-08-18T05:17:23.000Z",
"address": "0x64413fc2A1cBDF27043F7EbaCB36778687b07056",
"received": 0,
"transfers": 10
},
{
"sent": 0,
"lastAt": "2026-10-22T07:14:47.000Z",
"address": "0x81f9C853d7CC894F7EF742F62a265a5e9aeeB727",
"received": 5,
"transfers": 5
},
{
"sent": 0,
"lastAt": "2026-10-20T08:19:35.000Z",
"address": "0x7b0d132c6BF845d5a072B6CC9201546F0aF8a044",
"received": 5,
"transfers": 5
}
]
}
}Tags
x402
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