Know-Your-Agent counterparty screening — sanctions pillar

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xffFf4B8Da8C165B556326453446F6940C8AFE0DB",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "100000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "name": "Lazarus Group"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "_note": "Excerpt of a real answer (live service, 2026-07-01); hash/signature elided, signals/consolidated trimmed. Every answer pins the exact OFAC list version (published date + sha256 + entry count) it was judged against. Screening signal, not legal advice. The EIP-712 receipt — domain chainId 421614 = Arbitrum Sepolia, a frozen signing namespace, not a settlement rail — proves who signed these exact bytes (authenticity + tamper-evidence), not that the screening result is correct. Recompute keccak256(canonical answer bytes) and recover the signer before acting.",
          "answer": {
            "list_state": {
              "sdn": {
                "content_sha256": "a04efa5d60104ebd35fc08b6891811120d151bf37801fbd3c01e64380198f099",
                "entry_count": 19129,
                "published_date": "2026-06-30",
                "source": "OFAC SDN (Specially Designated Nationals and Blocked Persons)",
                "stale": false
              }
            },
            "methodology": "ss-v1",
            "query": {
              "address": null,
              "chain": null,
              "name": "Lazarus Group"
            },
            "reasons": [
              "name exactly matches OFAC SDN primary name \"LAZARUS GROUP\": entry #27307 \"LAZARUS GROUP\" [DPRK3] — list published 2026-06-30"
            ],
            "score": 0,
            "v": "sanctions-screen/v1",
            "verdict": "BLOCK"
          },
          "attestation": {
            "domain": {
              "chainId": 421614,
              "name": "BYTE Library",
              "verifyingContract": "0x44729bB148F46d8Db509E47b0453edc271e06e95",
              "version": "1"
            },
            "payloadHash": "0x…",
            "signature": "0x…",
            "signer": "0x344ECaCDe6566294c31397445c98b62a3EEEA456"
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "anyOf": [
                {
                  "required": [
                    "address"
                  ]
                },
                {
                  "required": [
                    "name"
                  ]
                }
              ],
              "description": "At least one of `address` or `name` is required.",
              "properties": {
                "address": {
                  "description": "Counterparty address: 0x+40-hex (EVM) or a digital-currency address. Checked against the OFAC SDN digital-currency annex.",
                  "type": "string"
                },
                "chain": {
                  "description": "Optional, informational only — the SDN annex pins addresses to currency symbols; chain never gates a hit.",
                  "type": "string"
                },
                "name": {
                  "description": "Counterparty name (individual or entity). Screened exact + conservative fuzzy against primary and a.k.a. names in the SDN + Consolidated lists.",
                  "maxLength": 256,
                  "minLength": 2,
                  "type": "string"
                }
              },
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "payperbyte-service-metadata": {
    "serviceName": "PayPerByte",
    "tags": [
      "payperbyte",
      "sanctions-screen",
      "ofac",
      "compliance",
      "signed-verdict"
    ]
  }
}

curl "https://x402.payperbyte.io/feeds/sanctions-screen"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://x402.payperbyte.io/feeds/sanctions-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://x402.payperbyte.io/feeds/sanctions-screen")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header