Give this API up to 10 domain names and it tells you whether each has a registration recor

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "8ugAWAXDB8V18kiUrGZTq1oMvU3C6Fxs8hfC6rvzQT3b",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "domains": [
            "example.com",
            "mybrand.ai",
            "coolstartup.io"
          ]
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "api_version": "1.0.0",
          "count": 2,
          "disclaimer": "Status reflects whether a registration record exists. It does not confirm price, premium status, or that an 'unregistered' name is purchasable at standard cost.",
          "queried_at": "2026-06-26T09:00:00Z",
          "results": [
            {
              "domain": "example.com",
              "note": "A registration record exists for this domain.",
              "rdap_source": "registry",
              "registered": true,
              "status": "registered",
              "tld_supported": true
            },
            {
              "domain": "thisnameprobablyhasnorecord12345.ai",
              "note": "No registration record found. Usually means unregistered, but reserved or premium names can also return this result.",
              "rdap_source": "registry",
              "registered": false,
              "status": "unregistered",
              "tld_supported": true
            }
          ]
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "additionalProperties": false,
              "properties": {
                "domains": {
                  "description": "Between 1 and 10 domain names to check, like 'example.com' or 'mybrand.ai'. Use the plain registrable domain only — no 'https://', no 'www.', no subdomains.",
                  "type": "array"
                }
              },
              "required": [
                "domains"
              ],
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "api_version": {
                  "type": "string"
                },
                "count": {
                  "type": "integer"
                },
                "disclaimer": {
                  "type": "string"
                },
                "queried_at": {
                  "type": "string"
                },
                "results": {
                  "items": {
                    "type": "object"
                  },
                  "type": "array"
                }
              },
              "required": [
                "count",
                "results",
                "queried_at",
                "disclaimer",
                "api_version"
              ],
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

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

const res = await fetch("https://domain-availability-checker.underscoredone.com/check");
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://domain-availability-checker.underscoredone.com/check")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header