seller payability derived

{
  "input": {
    "body": {
      "url": "https://agent402.tools/api/hash",
      "body": {
        "text": "hello"
      },
      "method": "POST"
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "url": "https://agent402.tools/api/hash",
      "flags": [
        "a stock buyer can pay this endpoint and get a result: nothing to fix"
      ],
      "method": "POST",
      "payable": true,
      "payment": {
        "ms": 2400,
        "error": null,
        "status": 200,
        "receipt": {
          "payer": "0x…",
          "network": "eip155:8453",
          "success": true,
          "transaction": "0x…"
        },
        "settled": true,
        "attempted": true
      },
      "challenge": {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "payTo": "0x…",
        "accepts": [],
        "networks": [
          "eip155:8453"
        ],
        "priceUsd": 0.01,
        "readable": true,
        "pricedFrom": "eip155:8453"
      },
      "checkedAt": "2026-09-11T02:00:00.000Z",
      "unpaidCall": {
        "ms": 180,
        "error": null,
        "status": 402,
        "bodySlice": "{}",
        "contentType": "application/json"
      },
      "responseSlice": "{\"summary\":\"…\"}",
      "domainFindings": [
        {
          "chain": "Base",
          "network": "eip155:8453",
          "verdict": "matches",
          "expectedName": "USD Coin",
          "advertisedName": "USD Coin"
        }
      ]
    }
  }
}