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DNS & Domain

DNS, WHOIS, SSL & domain checks

DNS & Domain handles DNS lookups, WHOIS registration data, SSL/TLS certificate checks, and domain availability — all in one tool. Essential for diagnosing infrastructure issues, monitoring certificate expiry, and finding available domains.

Tracking down a DNS misconfiguration or checking whether an SSL certificate is about to expire normally means running separate commands or visiting different tools. This tool consolidates them. Run all DNS record types in parallel, check who owns a domain and when it expires, verify certificate trust and days remaining, or batch-check a list of domain names for availability.

What you can do

  • lookup_dns — resolve all DNS record types (A, AAAA, MX, TXT, CNAME, NS, CAA, SOA) in parallel, or query a specific type
  • whois_lookup — registration data including owner, registrar, creation/expiry dates, and nameservers
  • check_ssl — SSL/TLS certificate details including expiry date, days remaining, issuer, and trust chain status
  • check_availability — batch-check multiple domain names across TLDs for registration availability

Who it's for

DevOps engineers, developers, sysadmins, and security teams who need to audit domains and diagnose DNS or certificate issues. Also useful for domain investors and businesses planning a launch who need to check name availability across multiple TLDs.

How to use it

  1. Use lookup_dns with a domain and record_type: "ALL" for a complete DNS audit
  2. Use whois_lookup to check ownership and find out when a domain expires
  3. Use check_ssl to verify certificate health — days_remaining is useful for setting up expiry alerts
  4. For a full domain audit, run lookup_dns, whois_lookup, and check_ssl together in parallel
DNS Lookup

Resolve DNS records for a domain. Returns A, AAAA, MX, TXT, CNAME, NS, CAA, and SOA records in parallel. Supports querying specific record types or all at once. Reports errors separately from empty results.

Returns: DNS records grouped by type with TTL and priority information where applicable
WHOIS Lookup

Perform a WHOIS lookup for a domain. Returns registrar, creation date, expiry date, nameservers, and registration status. Connects directly to WHOIS servers.

Returns: Parsed WHOIS data including registrar, dates, nameservers, status, and raw response
Check SSL Certificate

Inspect the SSL/TLS certificate for a domain. Returns issuer, subject, validity dates, protocol version, and days until expiry. Connects via TLS to port 443.

Returns: SSL certificate details including trust status, hostname match, issuer, expiry, cipher suite, and fingerprint
Check Domain Availability

Check if a domain name is registered or available for purchase. Uses DNS resolution and WHOIS to determine registration status. Supports batch checking of multiple domains.

Returns: Availability status for each domain (available/registered)
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v0.032026-05-08
  • check_availability now flags taken domains that are listed for sale on aftermarket marketplaces (Afternic, Sedo, Dan, Uniregistry, GoDaddy CashParking, Bodis, Above, ParkingCrew) by reading their parking nameservers, plus a deep-link to the listing page when one is known.
v0.022026-03-22
  • Added subtitle, expanded description, and agent instructions
v0.012026-03-20
  • Initial release

DNS & Domain Use Cases(6)

Browse all 6 DNS & Domainguides →
Open Look Up DNS Records

Look Up DNS Records

Query DNS records for any domain to inspect A, AAAA, MX, CNAME, TXT, and NS configurations.

DNS & Domain icon
DNS & Domain
4 agent guides
Open Check DNS Propagation Status

Check DNS Propagation Status

Verify whether recent DNS changes have propagated and the new records are live.

DNS & Domain icon
DNS & Domain
4 agent guides
Open Find Available Domain Names

Find Available Domain Names

Search for available domain names that match your brand, project, or business idea.

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Domain Search
4 agent guides
See every DNS & Domainuse case (Claude, ChatGPT, Copilot, OpenClaw guides) →

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Frequently Asked Questions

What DNS records can it check?

It can inspect common DNS record types in parallel, which makes it useful for quickly reviewing how a domain is configured.

Does it also check SSL certificates?

Yes. SSL and TLS expiry and trust checks are part of the same tool, alongside DNS and WHOIS lookups.

Can it tell me if a domain is available?

Yes. Domain availability checks are included, including batch checks when you want to compare options quickly.

Who is this most useful for?

It is especially useful for DevOps, security work, and domain buying or validation.