Screen an EVM wallet or contract address BEFORE paying it

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x058D0Cc5CC97e61e8A9f38D6d6365bce525921B2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "address": "0x722122dF12D4e14e13Ac3b6895a86e84145b6967",
          "chain": "ethereum"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "address": "0x722122df12d4e14e13ac3b6895a86e84145b6967",
          "as_of": "2026-09-09",
          "chain": "ethereum",
          "checked_lists": [
            "OFAC sanctioned crypto addresses",
            "curated taint set (mixer/hack/scam)"
          ],
          "disclaimer": "We screen against the OFAC sanctioned crypto-address list and a curated taint set; we do not give legal or financial advice and this is not a compliance certification. A clear result is not a guarantee of safety, and lists can lag real-world events. Verify against your own obligations before you pay.",
          "recommendation": "BLOCK",
          "risk": {
            "level": "blocked",
            "reasons": [
              "address is in the mixer taint set (Tornado Cash)"
            ]
          },
          "sanctioned": {
            "hit": false,
            "program": null,
            "source": null
          },
          "taint": {
            "categories": [
              "mixer"
            ],
            "hit": true,
            "label": "Tornado Cash: Router / proxy contract"
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "additionalProperties": false,
              "properties": {
                "address": {
                  "description": "EVM address to screen (0x + 40 hex chars, required).",
                  "pattern": "^0x[a-fA-F0-9]{40}$",
                  "type": "string"
                },
                "chain": {
                  "description": "Optional chain context (echoed back; screening is chain-agnostic).",
                  "enum": [
                    "arbitrum",
                    "avalanche",
                    "base",
                    "bsc",
                    "ethereum",
                    "optimism",
                    "polygon"
                  ],
                  "type": "string"
                }
              },
              "required": [
                "address"
              ],
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "address": {
                  "type": "string"
                },
                "as_of": {
                  "description": "date the lists were last refreshed.",
                  "type": "string"
                },
                "chain": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "checked_lists": {
                  "items": {
                    "type": "string"
                  },
                  "type": "array"
                },
                "disclaimer": {
                  "type": "string"
                },
                "recommendation": {
                  "description": "BLOCK | REVIEW | ALLOW.",
                  "type": "string"
                },
                "risk": {
                  "description": "level (blocked|caution|clear) + reasons[].",
                  "type": "object"
                },
                "sanctioned": {
                  "description": "hit(bool), source, program.",
                  "type": "object"
                },
                "taint": {
                  "description": "hit(bool), categories[], label.",
                  "type": "object"
                }
              },
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

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

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

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