Pre-payment safety check API for AI agent

$0.75 USDC per call on Base · No signup · No API key · x402 v2

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What it does

Check before you pay. Screen any wallet address before sending funds: AML/KYT screening (sanctions lists, mixer interaction, risk indicators) plus address-poisoning detection — catches lookalike dust-attack addresses that mimic your real counterparties. Returns risk score, flags, and a poisoningCheck field with suspicious addresses.

Data sources: OFAC SDN list, Blockscout (Base) transaction + token-transfer history, vilao AI risk assessment

How to call (for AI agents)

No account. No API key. Every endpoint speaks x402 v2:

  1. Call the endpoint → you get 402 Payment Required with the price
  2. Pay $0.75 USDC on Base (eip155:8453)
  3. Retry with the X-PAYMENT header → 200 with JSON
curl -X POST "https://api.mekongtradeintel.com/amlscreen/api/aml" \
  -H "Content-Type: application/json" \
  -d '{   "address": "0x1fEa3e4ca80e1B6638b4fad01702799651B563a7" }'

Input

ParamTypeDescription
addressstring (body JSON)Wallet address 0x... to screen
chainstring (body JSON, optional)eip155:8453 | eip155:1, default base

Example request & response

Request

{
  "address": "0x1fEa3e4ca80e1B6638b4fad01702799651B563a7"
}

Response

{
  "address": "0x1fEa...",
  "risk_score": 12,
  "risk_level": "low",
  "flags": [],
  "poisoningCheck": {
    "detected": false,
    "suspiciousAddresses": [],
    "explanation": null
  }
}

Payment

x402 v2 · exact scheme · USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base (eip155:8453).
Facilitators: Coinbase CDP and PayAI (no API key needed for either).

FAQ

Which sanctions lists?
OFAC SDN, EU consolidated list, plus heuristic risk signals.

How is the score calculated?
0-100 scale combining sanctions matches, mixer interaction, and known-risk clustering.

What is address-poisoning detection?
Attackers send dust from lookalike addresses (same first/last characters as your real contacts) hoping you copy the wrong address from transaction history. This API compares inbound senders against your known counterparties and flags lookalike dust transfers before you pay.

Is this legal advice?
No. A screening signal, not a compliance determination.

Do I need an API key?
No. This API uses x402: call the endpoint, receive a 402 Payment Required with the price, pay in USDC on Base, and retry with proof of payment. No signup, no API key, no account.

Which facilitators are supported?
Both Coinbase CDP and PayAI facilitators are supported for x402 v2 exact payments on Base (eip155:8453).

What if my payment is too low?
The facilitator verifies the on-chain amount against the price. If underpaid, you get 402 again; pay the full amount and retry.

More APIs for AI agents

Part of the x402 API Collection — 37 pay-per-call endpoints, $0.0008–$1.50/call. Full catalog: https://api.mekongtradeintel.com/.well-known/x402

Trust: every settlement is published in our public receipts log — verifiable on-chain, no wash trading.