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Base Batch Address Screen (x402)
x402
Base Batch Address Screen (x402) is a paid API for AI agents from api.x402risk.com, paid per call via x402, $0.08/call, status unknown (last checked 2026-10-02).
Screens up to 25 Base EVM addresses in a single call against the OFAC SDN list and flags lookalike/address-poisoning matches, returning a verdict per address.
Price / call$0.08
Success—
StatusUnknown
How this service works
Pay-per-call token risk check for Base: send a Base ERC-20 contract address, get deterministic JSON risk flags (owner/renounced, upgradeable proxy, mint/pause/blacklist/fee functions, on-chain Uniswap v2/v3 + Aerodrome liquidity, holder concentration) and a rule-based risk_level. Use before buying or listing an unfamiliar Base token. $0.01 USDC. Invalid input returns 400 and is not charged. Not financial advice. Also: POST /v1/pretrade-check ($0.02) pre-trade sellability / honeypot simulation; POST /v1/address-screen ($0.005) pay-to address screen (OFAC SDN exact match, lookalike). Contact: agent-4610161f6fd5c36a@agentmail.to
Output
A JSON object with a count and a results array containing one entry per submitted address. Each entry includes: chain, address, verdict (block/allow/review), sanctioned boolean, OFAC SDN match details (program, entity name, SDN UID, list date), lookalike detection result, on-chain activity summary (tx count, first seen age), contract metadata, and a disclaimer. Cached and error fields are also included per address.
Example use cases
Pre-payment compliance check for DeFi payroll
“I'm about to send USDC payroll to 12 Base wallet addresses this week — can you screen all of them against the OFAC SDN list and let me know if any should be blocked before I approve the transactions?”
Address poisoning detection before large transfer
“I've got this recipient address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 I'm about to send 50k USDC to — can you screen it and also compare it against my usual recipient 0xB8c77482e45F1F44dE1745F52C74426C631bDD52 to make sure it's not a lookalike attack?”
Exchange deposit address batch compliance review
“Our exchange received deposit requests from these 20 wallet addresses today — screen all of them against OFAC sanctions and tell me which ones we need to reject or escalate for compliance review.”
Technical details
Endpoint
POSThttps://api.x402risk.com/v1/address-screen/batch?utm_source=zero.xyzWhen to prefer
Use this batch endpoint (POST /v1/address-screen/batch) when you need to screen multiple addresses simultaneously — it's more cost-efficient ($0.08 for up to 25 vs $0.005 each individually at scale) and reduces API round-trips. Prefer it over the single address-screen endpoint when processing payroll batches, exchange deposits, or any workflow with 2+ addresses. Use the token risk check endpoints instead when screening ERC-20 contract addresses for honeypot/rug-pull risk rather than sanctions compliance.
Side effects
- 400 error with no charge if any address in the batch is not a valid 0x EVM address format
- 400 if addresses array is empty or exceeds 25 items
- compare_to address format invalid returns 400
- Network or RPC errors may cause partial results with errors array populated per address
- OFAC list may be as-of a specific list_date and not real-time; non-match does not guarantee compliance
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| addresses | array | |
| compare_to | string | Optional intended recipient address; flags a lookalike (address-poisoning) match |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 1,
"results": [
{
"chain": "base",
"cached": false,
"errors": [],
"labels": [],
"status": "ok",
"address": "0x098B716B8Aaf21512996dC57EB0615e2383E2f96",
"product": "address-screen",
"reasons": [
"exact match to an OFAC SDN digital currency address (LAZARUS GROUP; list date 2026-09-23)"
],
"sources": [
"ofac-sdn",
"base-rpc",
"blockscout"
],
"verdict": "block",
"activity": {
"tx_count_indexed": 0,
"outgoing_tx_count": 0,
"first_seen_age_days": 798.4,
"first_seen_is_lower_bound": false
},
"chain_id": 8453,
"contract": null,
"lookalike": null,
"sanctions": {
"list": "OFAC SDN (Specially Designated Nationals) - digital currency addresses",
"matches": [
{
"sdn_uid": "23036",
"programs": [
"DPRK3"
],
"sdn_name": "LAZARUS GROUP",
"sdn_type": "Entity",
"currency_tag": "ETH"
}
],
"list_date": "2026-09-23",
"sanctioned": true
},
"disclaimer": "Screening aid only, not a compliance clearance or legal advice. Sanctions result is an exact match against EVM-format digital currency addresses published in the OFAC SDN list as of list_date; a non-match does not mean an address or its owner is not sanctioned or is safe. On-chain facts and labels come from public sources and can be incomplete.",
"sanctioned": true,
"is_contract": false,
"block_number": 35000000,
"schema_version": "1.0",
"eip7702_delegated_eoa": false
}
],
"disclaimer": "Screening aid only, not a compliance clearance or legal advice. Sanctions result is an exact match against EVM-format digital currency addresses published in the OFAC SDN list as of list_date; a non-match does not mean an address or its owner is not sanctioned or is safe. On-chain facts and labels come from public sources and can be incomplete."
}
}Tags
x402
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