You can access the Bulk Domain WHOIS, DNS & SSL Checker programmatically from your own applications by using the Apify API. You can also choose the language preference from below. To use the Apify API, you’ll need an Apify account and your API token, found in API & Integrations in Apify Console.

Python

JavaScript

CLI

OpenAPI

HTTP

MCP

{
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  "info": {
    "version": "0.1",
    "x-build-id": "K0dn9WT3mo2S1taYo"
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  "servers": [
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  "components": {
    "schemas": {
      "inputSchema": {
        "type": "object",
        "required": [
          "domains"
        ],
        "properties": {
          "domains": {
            "title": "Domains",
            "type": "array",
            "description": "Domains (apify.com), website URLs (https://www.apify.com/store) or email addresses (hello@apify.com). Duplicates are checked once.",
            "items": {
              "type": "string"
            }
          },
          "checkRegistration": {
            "title": "WHOIS / RDAP registration",
            "type": "boolean",
            "description": "Registrar, creation & expiry dates, domain age, status, nameservers, DNSSEC.",
            "default": true
          },
          "checkDns": {
            "title": "DNS & email security",
            "type": "boolean",
            "description": "A, AAAA, NS, MX, TXT, CAA records, DNS & email provider, SPF and DMARC.",
            "default": true
          },
          "checkSsl": {
            "title": "SSL certificate",
            "type": "boolean",
            "description": "Issuer, validity, expiry date and hostname match.",
            "default": true
          },
          "checkWebsite": {
            "title": "Website status",
            "type": "boolean",
            "description": "HTTP status, final URL after redirects and HTTPS redirect.",
            "default": true
          },
          "expiryWarningDays": {
            "title": "Expiry warning (days)",
            "minimum": 1,
            "type": "integer",
            "description": "Flag domains and SSL certificates expiring within this many days.",
            "default": 30
          },
          "maxConcurrency": {
            "title": "Domains in parallel",
            "minimum": 1,
            "maximum": 50,
            "type": "integer",
            "description": "How many domains to check in parallel.",
            "default": 10
          },
          "proxyConfiguration": {
            "title": "Proxy configuration",
            "type": "object",
            "description": "Applies to RDAP and website requests only. Usually not needed."
          }
        }
      },
      "runsResponseSchema": {
        "type": "object",
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          "data": {
            "type": "object",
            "properties": {
              "id": {
                "type": "string"
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              "actId": {
                "type": "string"
              },
              "userId": {
                "type": "string"
              },
              "startedAt": {
                "type": "string",
                "format": "date-time",
                "example": "2025-01-08T00:00:00.000Z"
              },
              "finishedAt": {
                "type": "string",
                "format": "date-time",
                "example": "2025-01-08T00:00:00.000Z"
              },
              "status": {
                "type": "string",
                "example": "READY"
              },
              "meta": {
                "type": "object",
                "properties": {
                  "origin": {
                    "type": "string",
                    "example": "API"
                  },
                  "userAgent": {
                    "type": "string"
                  }
                }
              },
              "stats": {
                "type": "object",
                "properties": {
                  "inputBodyLen": {
                    "type": "integer",
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                    "type": "integer",
                    "example": 0
                  },
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                    "type": "integer",
                    "example": 0
                  },
                  "resurrectCount": {
                    "type": "integer",
                    "example": 0
                  },
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                    "type": "integer",
                    "example": 0
                  }
                }
              },
              "options": {
                "type": "object",
                "properties": {
                  "build": {
                    "type": "string",
                    "example": "latest"
                  },
                  "timeoutSecs": {
                    "type": "integer",
                    "example": 300
                  },
                  "memoryMbytes": {
                    "type": "integer",
                    "example": 1024
                  },
                  "diskMbytes": {
                    "type": "integer",
                    "example": 2048
                  }
                }
              },
              "buildId": {
                "type": "string"
              },
              "defaultKeyValueStoreId": {
                "type": "string"
              },
              "defaultDatasetId": {
                "type": "string"
              },
              "defaultRequestQueueId": {
                "type": "string"
              },
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                "type": "string",
                "example": "1.0.0"
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              "containerUrl": {
                "type": "string"
              },
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                "properties": {
                  "ACTOR_COMPUTE_UNITS": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATASET_READS": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATASET_WRITES": {
                    "type": "integer",
                    "example": 0
                  },
                  "KEY_VALUE_STORE_READS": {
                    "type": "integer",
                    "example": 0
                  },
                  "KEY_VALUE_STORE_WRITES": {
                    "type": "integer",
                    "example": 1
                  },
                  "KEY_VALUE_STORE_LISTS": {
                    "type": "integer",
                    "example": 0
                  },
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                    "type": "integer",
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                  "REQUEST_QUEUE_WRITES": {
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                  },
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                    "example": 0
                  },
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                    "type": "integer",
                    "example": 0
                  },
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                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_SERPS": {
                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_UNBLOCKER_UNITS": {
                    "type": "integer",
                    "example": 0
                  }
                }
              },
              "usageTotalUsd": {
                "type": "number",
                "example": 0.00005
              },
              "usageUsd": {
                "type": "object",
                "properties": {
                  "ACTOR_COMPUTE_UNITS": {
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                  },
                  "DATASET_READS": {
                    "type": "integer",
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                  },
                  "DATASET_WRITES": {
                    "type": "integer",
                    "example": 0
                  },
                  "KEY_VALUE_STORE_READS": {
                    "type": "integer",
                    "example": 0
                  },
                  "KEY_VALUE_STORE_WRITES": {
                    "type": "number",
                    "example": 0.00005
                  },
                  "KEY_VALUE_STORE_LISTS": {
                    "type": "integer",
                    "example": 0
                  },
                  "REQUEST_QUEUE_READS": {
                    "type": "integer",
                    "example": 0
                  },
                  "REQUEST_QUEUE_WRITES": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATA_TRANSFER_INTERNAL_GBYTES": {
                    "type": "integer",
                    "example": 0
                  },
                  "DATA_TRANSFER_EXTERNAL_GBYTES": {
                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_RESIDENTIAL_TRANSFER_GBYTES": {
                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_SERPS": {
                    "type": "integer",
                    "example": 0
                  },
                  "PROXY_UNBLOCKER_UNITS": {
                    "type": "integer",
                    "example": 0
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}

Bulk Domain WHOIS, DNS & SSL Checker OpenAPI definition

OpenAPI is a standard for designing and describing RESTful APIs, allowing developers to define API structure, endpoints, and data formats in a machine-readable way. It simplifies API development, integration, and documentation.

OpenAPI is effective when used with AI agents and GPTs by standardizing how these systems interact with various APIs, for reliable integrations and efficient communication.

By defining machine-readable API specifications, OpenAPI allows AI models like GPTs to understand and use varied data sources, improving accuracy. This accelerates development, reduces errors, and provides context-aware responses, making OpenAPI a core component for AI applications.

You can download the OpenAPI definitions for Bulk Domain WHOIS, DNS & SSL Checker from the options below:

OpenAPI.json

If you’d like to learn more about how OpenAPI powers GPTs, read our blog post.

You can also check out our other API clients:

Bulk Domain WHOIS, DNS & SSL Checker API in Python

Bulk Domain WHOIS, DNS & SSL Checker API in JavaScript

Bulk Domain WHOIS, DNS & SSL Checker API through CLI

Bulk Domain WHOIS, DNS & SSL Checker API

Domain Availability Checker — Bulk DNS & WHOIS Lookup

automation-lab/domain-availability-checker

Check exact domain names in bulk and return available/registered verdicts with DNS/WHOIS method, registrar, creation/expiry dates, name servers, timing, and errors in structured JSON.

Automation Lab

207

DNS Record & Whois Lookup

onescales/dns-record-whois-lookup

Bulk DNS lookup for all 13 record types (A, MX, TXT, NS, SOA, CAA, TLSA & more) + WHOIS data. Check registrar, expiry & DNS config for thousands of domains instantly.

One Scales

5.0

(2)

Domain WHOIS Lookup - Age, Expiry, Registrar, DNS

george.the.developer/domain-whois-lookup

Look up WHOIS data, domain age, expiration date, registrar, nameservers, and DNS records for any domain. Bulk lookup supported.

George Kioko

Domain WHOIS, DNS and SSL Expiry Lookup (RDAP)

pistachio_implementation/domain-whois-dns-ssl-lookup

Bulk domain lookup from official sources. Registrar, creation date, age and expiry date via RDAP, the modern WHOIS; A, MX, NS, TXT, SPF and DMARC records; and the SSL certificate issuer and days to expiry. $1.50 per 1,000 domains.

Hay Equipos

WHOIS Domain Lookup — Registrar, Age, Expiry & DNS (Bulk)

ntriqpro/whois-domain-lookup

Look up WHOIS records for hundreds of domains in a single run: registrar, creation and expiry dates, domain age, days until expiry, nameservers, DNSSEC and status codes. Public registry data for every major TLD (.com, .org, .io, .co.uk and more) — no API keys, structured JSON/CSV output.

Daniel Carter

107

Bulk Domain Checker: WHOIS Lookup, DNS, SSL & HTTP

aiqlabs/bulk-domain-checker

Check a list of domains in one run: DNS records, mail provider from MX, SPF/DMARC, HTTP status and full redirect chain, SSL certificate expiry, and WHOIS/RDAP registration - plus a plain-English issue list per domain. No API keys.

Ai-Q Labs

Domain Health Checker — WHOIS/RDAP, SSL & DNS

nuhemugames/domain-health-checker

Bulk domain intelligence: registrar, age and expiry via official RDAP (structured WHOIS), SSL certificate expiry and trust, DNS records (A/AAAA/MX/NS/TXT), plus clear warnings like "expires in 30 days". Registrant contact details are never extracted - registry facts only.

kuon

SSL Certificate Checker

scrappy_garden/ssl-certificate-checker

Check SSL/TLS certificates for any website: expiration date, issuer, subject, hostname match (SNI), chain/authorization status, and common HTTPS misconfigurations. Useful for SEO audits, security checks, and uptime monitoring.

Bikram Adhikari

Bulk Domain Audit — WHOIS, DNS, SPF/DMARC & SSL Checker

jungle_synthesizer/dns-domain-audit

Bulk domain audit in one run: WHOIS registration lookup, DNS record lookup, SPF/DMARC/DKIM email authentication checker, SSL certificate expiry and reverse DNS. Feed it a list of domains, get one structured record each. For sales-ops enrichment, email deliverability checks and devops inventory.

BowTiedRaccoon

5.0

(1)

Domain WHOIS & Age Checker: Bulk RDAP Registration Data

scrapemint/domain-whois-checker

Check domain registration data in bulk: registrar, creation and expiry dates, age, status locks, nameservers, DNSSEC, and whether a domain is registered at all. Uses RDAP, the official registry JSON protocol, so results come straight from the source. Keyless, no browser, no rate walls.