Wallet risk check API: fresh or throwaway Base wallets

$0.01 per call · failed calls are never charged · no account or subscription: pay per call with a card key or USDC

Screen a Base address for fresh or throwaway-wallet signals: a high/medium/low heuristic risk tier with named flags (no or one outgoing transaction, a near-empty balance with few transactions), plus ETH, USDC, WETH, cbBTC and DAI balances and the account nonce. Address type is reported separately and does not affect the tier; token contracts are not audited. Use to screen a Base address; OFAC and other chains: check_counterparty.

When to use it

Run it free (25 free calls) Buy credits by card (from $1) Example result (JSON)

Try it with your own inputs

Base chain wallet address, 0x-prefixed 20-byte hex

Uses one of your 25 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
address (required)stringBase chain wallet address, 0x-prefixed 20-byte hex

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://tools.funwords.eu/wallet-audit?address=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"

Or one of your 25 free calls, no key:

curl "https://tools.funwords.eu/wallet-audit?address=0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "chain": "base",
  "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
  "type": "eoa",
  "riskLevel": "low",
  "riskFlags": [],
  "summary": "low risk: 0 flag(s). 2 token(s) held. Account nonce: 42.",
  "eth": {
    "wei": "1500000000000000000",
    "formatted": "1.5"
  },
  "accountNonce": 42,
  "tokenCount": 2,
  "tokens": [
    {
      "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "symbol": "USDC",
      "decimals": 6,
      "balance": "1000000000",
      "balanceFormatted": "1000",
      "riskLevel": "unknown"
    },
    {
      "address": "0x4200000000000000000000000000000000000006",
      "symbol": "WETH",
      "decimals": 18,
      "balance": "500000000000000000",
      "balanceFormatted": "0.5",
      "riskLevel": "unknown"
    }
  ],
  "labels": [],
  "limitations": [
    "accountNonce is the Base EVM account nonce; for EOAs it reflects outgoing transactions only, not full transaction, token-transfer, or trading history."
  ],
  "lastUpdatedBlock": 18650000
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is wallet_audit, and the first 25 successful calls are free:

https://tools.funwords.eu/mcp

Questions

Does it check sanctions?

No. For OFAC screening and other chains use /check/counterparty.

Does the address type affect the tier?

No, it is reported separately.

How do I pay?

Each successful call costs $0.01; failed calls are not charged. The first 25 calls are free. Then pay with card credits (from $1; the key goes in an Authorization header or, for clients that can only fetch a URL, as api_key= in the URL) or per call in USDC over x402 or MPP. No account is needed.

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