{
  "x402Version": 2,
  "id": 28510,
  "slug": "28510",
  "resource": "https://domain-availability-checker.underscoredone.com/check",
  "description": "Give this API up to 10 domain names and it tells you whether each has a registration record at the official registry. It uses RDAP, the structured replacement for WHOIS, so there is no free-text parsing. Each domain comes back as 'registered', 'unregistered', or 'indeterminate' when the registry has no RDAP for that ending. 'Unregistered' means no record was found, which usually means available - but reserved and premium names also return no record. Registration status only; no pricing.",
  "type": "http",
  "serviceName": "Domain Availability Checker",
  "resourceType": "Monitoring",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "10000",
      "amountUsd": 0.01,
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "payTo": "8ugAWAXDB8V18kiUrGZTq1oMvU3C6Fxs8hfC6rvzQT3b",
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "amount": "10000",
      "amountUsd": 0.01,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "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"
  },
  "extensions": {
    "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"
      }
    }
  },
  "tags": [
    "domain availability",
    "is domain available",
    "is domain registered",
    "check domain availability",
    "domain name search",
    "bazaar"
  ],
  "sourceHost": "domain-availability-checker.underscoredone.com",
  "lastUpdated": "2026-10-08T05:33:13.342Z",
  "quality": {
    "calls30d": 6,
    "uniquePayers30d": 4,
    "lastCalledAt": "2026-10-08T05:33:13.154Z"
  },
  "metadata": {
    "serviceName": "Domain Availability Checker",
    "extensions": {
      "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"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "domain-availability-checker.underscoredone.com",
    "manifest_name": "domain-availability-checker.underscoredone.com",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
  },
  "exampleResponse": {
    "example": {
      "api_version": "string",
      "count": 0,
      "disclaimer": "string",
      "queried_at": "string",
      "results": [
        {}
      ]
    },
    "type": "string"
  }
}