Security · x402 · early usage

Pay-to / counterparty address screen for Base: exact match against OFAC SDN published d…

Name: Pay-to / counterparty address screen for Base: exact match against OFAC SDN published digi
Price: 0.005 USD
Availability: InStock

by api.x402risk.com · discovered, not yet claimed by its owner · updated 2026-10-09

30d calls3

30d payers3

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Pay-to / counterparty address screen for Base: exact match against OFAC SDN published digital currency addresses (daily refresh, list date included), contract vs EOA, Blockscout verification, first-seen age and tx count, lookalike (address-poisoning) check vs an optional compare_to, labels, and a block/caution/ok verdict. $0.005 USDC. Screening aid only, not a compliance clearance or legal advice.

Tags: base · address · sanctions · ofac · screening · bazaar

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-09

Input example from Bazaar metadata

{
  "address": "0x098B716B8Aaf21512996dC57EB0615e2383E2f96"
}

Output example

{
  "activity": {
    "first_seen_age_days": 798.4,
    "first_seen_is_lower_bound": false,
    "outgoing_tx_count": 0,
    "tx_count_indexed": 0
  },
  "address": "0x098B716B8Aaf21512996dC57EB0615e2383E2f96",
  "block_number": 35000000,
  "cached": false,
  "chain": "base",
  "chain_id": 8453,
  "contract": null,
  "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.",
  "eip7702_delegated_eoa": false,
  "errors": [],
  "is_contract": false,
  "labels": [],
  "lookalike": null,
  "product": "address-screen",
  "reasons": [
    "exact match to an OFAC SDN digital currency address (LAZARUS GROUP; list date 2026-09-23)"
  ],
  "sanctioned": true,
  "sanctions": {
    "list": "OFAC SDN (Specially Designated Nationals) - digital currency addresses",
    "list_date": "2026-09-23",
    "matches": [
      {
        "currency_tag": "ETH",
        "programs": [
          "DPRK3"
        ],
        "sdn_name": "LAZARUS GROUP",
        "sdn_type": "Entity",
        "sdn_uid": "23036"
      }
    ],
    "sanctioned": true
  },
  "schema_version": "1.0",
  "sources": [
    "ofac-sdn",
    "base-rpc",
    "blockscout"
  ],
  "status": "ok",
  "verdict": "block"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/36556.json for the price and payment options.
Pay. Call GET https://api.x402risk.com/v1/address-screen. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.005 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 3 calls · 3 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.005	0x8F9C3f91628497E2A72D6740022D46f87A9eB417	120s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x8F9C3f91628497E2A72D6740022D46f87A9eB417",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 120
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "activity": {
          "description": "outgoing_tx_count, tx_count_indexed, first_seen_at, first_seen_age_days",
          "type": "object"
        },
        "address": {
          "type": "string"
        },
        "block_number": {
          "type": [
            "integer",
            "null"
          ]
        },
        "cached": {
          "type": "boolean"
        },
        "chain": {
          "type": "string"
        },
        "contract": {
          "description": "verified (Blockscout), name, proxy_type, creator, creation_tx, created_at",
          "type": [
            "object",
            "null"
          ]
        },
        "disclaimer": {
          "type": "string"
        },
        "eip7702_delegated_eoa": {
          "type": "boolean"
        },
        "errors": {
          "type": "array"
        },
        "is_contract": {
          "type": [
            "boolean",
            "null"
          ]
        },
        "labels": {
          "items": {
            "type": "object"
          },
          "type": "array"
        },
        "lookalike": {
          "description": "compare_to, prefix_match_hex, suffix_match_hex, lookalike",
          "type": [
            "object",
            "null"
          ]
        },
        "product": {
          "type": "string"
        },
        "reasons": {
          "items": {
            "type": "string"
          },
          "type": "array"
        },
        "sanctioned": {
          "description": "Exact match to an OFAC SDN published digital currency address",
          "type": "boolean"
        },
        "sanctions": {
          "description": "matches[], list, list_date, list_fetched_at, source_url",
          "type": "object"
        },
        "schema_version": {
          "type": "string"
        },
        "sources": {
          "type": "array"
        },
        "status": {
          "enum": [
            "ok",
            "partial",
            "error"
          ],
          "type": "string"
        },
        "verdict": {
          "enum": [
            "block",
            "caution",
            "ok"
          ],
          "type": "string"
        }
      },
      "required": [
        "schema_version",
        "address",
        "status",
        "verdict",
        "reasons",
        "sanctioned",
        "disclaimer"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "activity": {},
    "address": "string",
    "block_number": 0,
    "cached": true,
    "chain": "string",
    "contract": {},
    "disclaimer": "string",
    "eip7702_delegated_eoa": true,
    "errors": [
      "value"
    ],
    "is_contract": true,
    "labels": [
      {}
    ],
    "lookalike": {},
    "product": "string",
    "reasons": [
      "string"
    ],
    "sanctioned": true,
    "sanctions": {},
    "schema_version": "string",
    "sources": [
      "value"
    ],
    "status": "ok",
    "verdict": "block"
  },
  "type": "string"
}

Examples

curl

curl "https://api.x402risk.com/v1/address-screen"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.x402risk.com/v1/address-screen");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.x402risk.com/v1/address-screen")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: api.x402risk.com
Endpoint: https://api.x402risk.com/v1/address-screen
Machine-readable: /resources/36556.json