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ChainWard Wallet Risk Check API
x402
ChainWard Wallet Risk Check API is a paid API for AI agents from api.chainward.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-14).
Returns a pay/hold verdict with risk flags and OFAC sanctions screen for a Base or BNB Chain wallet address before payment
Price / call$0.01
Success—
StatusUnknown
How this service works
Before your agent pays a Base or BNB Chain address: a verdict (pay / hold / unknown, shown as Pay, Hold, Inactive, No track record or Couldn't check) with the one reason ($0.05). For a seller: real or self-funded demand ($0.10). For a BNB Chain agent: hired by others or by its own circle ($0.10). Before every payment: an OFAC sanctions screen ($0.01). Evidence and limits under every verdict. Paid in USDC on Base over x402; a check that fails is never charged.
Output
A JSON object containing a verdict label (e.g. 'no_flags', 'hold', 'inactive'), a human-readable reason for the verdict, whether the address is OFAC-sanctioned, wallet age in days, sent transaction count, USDC and native token balances, first-seen and last-active timestamps, first funder details (including whether they are an exchange/hub and whether they are sanctioned), risk flags array, and a limits/caveats string explaining what the check does and does not prove.
Example use cases
Pre-payment sanctions screening
“I'm about to pay 0x9a3f2b1c4e8d7f6a5b0c3e2d1f4a8b7c6d5e4f3a on Base — can you do a quick ChainWard check to make sure it's not OFAC-sanctioned and shows a Pay verdict before I send anything?”
Vetting a new freelance contractor wallet
“A contractor just sent me their BNB Chain address 0x1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c for payment — can you check it with ChainWard to see if it has real transaction history or looks self-funded and sketchy?”
Automated agent payment guard
“My agent is about to make a payout to 0x7f8e9d0c1b2a3f4e5d6c7b8a9f0e1d2c3b4a5f6e on Base — run a ChainWard risk check first and only proceed if the verdict is Pay and there are no sanctions hits.”
Technical details
Endpoint
GEThttps://api.chainward.ai/api/risk/wallet?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or automated system needs a fast, per-call pre-payment risk check on a specific Base or BNB Chain wallet address. It is ideal for agentic payment flows that need lightweight OFAC sanctions screening and on-chain history signals before disbursing USDC. Prefer it over manual blockchain explorers when you need a structured pay/hold verdict with a stated reason rather than raw transaction data. It is best suited for single-address spot checks; for bulk audits or full dataset access, sibling endpoints on api.chainward.ai may be more appropriate.
Side effects
- Address parameter missing or malformed (not a valid 0x hex address) — returns error, no charge
- Chain not supported — only 'base' and 'bsc' are valid values
- Address data unavailable on-chain — verdict returned as 'unknown' or 'Couldn't check', no charge applied
- Payment failure via x402 — check not executed
- Rate limiting or API unavailability — request fails with error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"type": "wallet",
"chain": "base",
"flags": [],
"limits": "On-chain facts only. A shared funder is not proof of one owner, and exchanges and other hubs hide who funded a wallet. no_flags means none of these checks matched; it is not a clearance.",
"address": "0x4baadba26c3c0bdef9e8faf173925d463aa53bb2",
"verdict": {
"label": "no_flags",
"reason": "None of the checks matched: sanctions, age, history and first funder."
},
"age_days": 616,
"balances": {
"usdc": 5451.386272,
"native": 0.01916580034492214
},
"sent_txs": 87,
"first_seen": "2025-02-04T12:26:09.000Z",
"sanctioned": false,
"as_of_block": 52553137,
"last_active": "2026-01-30T15:58:27.000Z",
"first_funder": {
"tx": "0xaf801c6252bb681fc6654b763a1d530cc3828c918dd34774e64a8a33d53e20f3",
"address": "0x0dff09a6733a12366236e62111a4ce93c475db78",
"sanctioned": false,
"funded_wallets": null,
"exchange_or_hub": true
}
},
"success": true
}
}Tags
x402
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