OnchainCheck Wallet Safety Lite Check

x402

OnchainCheck Wallet Safety Lite Check 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).

Screens a crypto wallet address for OFAC sanctions, wallet age, account type, first funder, and recent large transfers across EVM chains and Solana, returning ok/caution/block with plain-English reasons

Price / call$0.01

Seller volume →—

Success—

StatusUnknown

How this service works

Is it safe to pay this address? The address-only version of /check: OFAC SDN sanctions screen, wallet age, EOA or contract, first funder and recent large transfers on Base, Ethereum, Arbitrum, Optimism or Polygon (wallet kind and activity on Solana), with the funder and counterparties screened too. Returns ok, caution or block with plain reasons. No token score (use /check for that). Rules-based, not legal advice.

Output

A JSON object with a top-level verdict (ok, caution, or block), per-check results (sanctions, wallet, token), plain-English notes and rules, wallet metadata (age in days, first activity timestamp and tx, account kind, native balance and USD value, first funder address/amount/tx, recent large transfers), and activity stats (transfer counts by category, inbound/outbound scan counts). No token score is included.

Example use cases

Screen payee before crypto payment

“I'm about to pay 0xAbC1234567890abcdef1234567890abCDEF12345 on Base — can you check if it's safe? I want to know if it's on any sanctions list, how old the wallet is, and whether it's a regular wallet or a contract.”

Verify vendor wallet before B2B settlement

“We're about to wire a large USDC settlement to this Polygon address 0x9f8F72aA9304c8B593d555F12eF6589cC3A579A2. Can you run a safety screen on it — sanctions check, wallet age, first funder, any red flags?”

Validate Solana address for marketplace payout

“Before I pay out to this Solana address GbE4bDHGFqnhFxBXN1NjbaqZCGH1J1fFjhDauGgDHiLE, can you check if it's sanctioned or has any caution flags on it?”

Technical details

Endpoint

GEThttps://onchaincheck.dev/check/lite?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a fast, rules-based safety verdict on a wallet address before making a crypto payment, without needing a full token risk score. It is ideal for payment automation agents, DeFi bots, and compliance pipelines that need sanctions screening plus wallet hygiene checks (age, funder, account type) across Base, Ethereum, Arbitrum, Optimism, Polygon, or Solana in a single call. Use /check instead if you also need a token-level risk score.

Side effects

Invalid address format returns a validation error — address must match EVM 0x hex or Solana base58 pattern
Unsupported chain value returns an error; chain must be one of base, eth, arbitrum, optimism, polygon, or solana
Address with no on-chain activity may return caution with 'no activity' reason
OFAC list copy may be dated (listAsOf timestamp included in response); not a real-time live feed
Payment failure if USDC balance is insufficient for the $0.01 per-call fee

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "chain": "base",
    "notes": "Screens only the digital currency addresses that OFAC publishes on its SDN list, from a copy dated listAsOf. It is not legal advice and not a complete sanctions or AML check: it doesn't cover addresse… (538 chars, truncated in this example)",
    "rules": "block if the address or token contract is on the OFAC SDN list; caution if the wallet's first activity is under 7 days old, it has no activity, it isn't the expected kind (expect=eoa or contract), the… (366 chars, truncated in this example)",
    "token": null,
    "checks": {
      "token": "not requested",
      "wallet": "ok",
      "sanctions": "ok"
    },
    "expect": "any",
    "wallet": {
      "age": {
        "ageDays": 887.48,
        "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… (303 chars, truncated in this example)",
      "account": {
        "kind": "minimal proxy (often a smart-contract wallet)",
        "isContract": true,
        "nativeBalance": "7.554675633166555733",
        "nativeBalanceUsd": 17943.261
      },
      "address": "0x2211d1D0020DAEA8039E46Cf1367962070d77DA9",
      "activity": {
        "newestAt": "2026-10-24T05:00:45.000Z",
        "byCategory": {
          "erc20": 191,
          "erc721": 7
        },
        "moreHistory": true,
        "inboundScanned": 100,
        "oldestScannedAt": "2026-03-04T20:47:51.000Z",
        "outboundScanned": 100,
        "transfersScanned": 198
      },
      "nativeUsd": {
        "price": 2375.12,
        "source": "Chainlink ETH/USD",
        "symbol": "ETH",
        "updatedAt": "2026-10-24T05:22:13.000Z"
      },
      "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": "2026-10-24T05:00:45.000Z",
          "usd": null,
          "hash": "0x752430ea85cadfe914d0c16b5381cbb9c21712a4d9e80370cb30d80dbe6cfa6d",
          "asset": "ZORA",
          "block": 53014349,
          "token": "0x1111111111166b7FE7bd91427724B487980aFc69",
          "amount": 3.3284995,
          "category": "erc20",
          "direction": "in",
          "counterparty": "0xC8d077444625eB300A427a6dfB2b1DBf9b159040"
        },
        {
          "at": "2026-10-24T04:46:57.000Z",
          "usd": null,
          "hash": "0x009afd13a1564ed3dbac4f0afd7c6686f5f9a1cccb5bfcc59e5de44f1b777c45",
          "asset": "ZORA",
          "block": 53013935,
          "token": "0x1111111111166b7FE7bd91427724B487980aFc69",
          "amount": 12.36068016,
          "category": "erc20",
          "direction": "in",
          "counterparty": "0xC8d077444625eB300A427a6dfB2b1DBf9b159040"
        }
      ],
      "topCounterparties": [
        {
          "sent": 0,
          "lastAt": "2026-10-24T05:00:45.000Z",
          "address": "0xC8d077444625eB300A427a6dfB2b1DBf9b159040",
          "received": 72,
          "transfers": 72
        },
        {
          "sent": 0,
          "lastAt": "2026-10-24T03:01:49.000Z",
          "address": "0x4Ee35c658b8032a7577096B60bd51Ae9909E4f98",
          "received": 18,
          "transfers": 18
        }
      ]
    },
    "address": "0x2211d1D0020DAEA8039E46Cf1367962070d77DA9",
    "reasons": [
      {
        "code": "not_sanctioned",
        "text": "The address is not found on the OFAC SDN list as of 2026-10-21.",
        "level": "info"
      },
      {
        "code": "wallet_age",
        "text": "First activity was 887 days ago.",
        "level": "info"
      },
      {
        "code": "account_kind",
        "text": "The address is a contract (minimal proxy (often a smart-contract wallet)), not a wallet (EOA).",
        "level": "info"
      }
    ],
    "summary": {
      "kind": "minimal proxy (often a smart-contract wallet)",
      "ageDays": 887.48,
      "isWallet": false,
      "listAsOf": "2026-10-21",
      "tokenRisk": null,
      "sanctioned": false,
      "firstFunder": "0x1985EA6E9c68E1C272d8209f3B478AC2Fdb25c87",
      "newestActivityAt": "2026-10-24T05:00:45.000Z",
      "largeTransfersRecent": 2
    },
    "verdict": "ok",
    "sanctions": {
      "result": "not found on the OFAC SDN list as of 2026-10-21",
      "matches": [],
      "listAsOf": "2026-10-21",
      "sanctioned": false,
      "listAgeDays": 3,
      "listAddresses": 1065
    },
    "tokenAddress": null
  }
}

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