# Services from domain-dns.x402tookit.com on Zero

> domain-dns.x402tookit.com serves 9 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/domain-dns.x402tookit.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/domain-dns.x402tookit.com/health.json

## Services

- [Domain Nameserver Health Check](https://www.zero.xyz/c/domain-nameserver-health-check-59fd7eeb/llms.txt): $0.03/call via x402. Returns nameserver count, provider diversity, individual resolution status, and SOA serial for a given domain.
- [Domain and DNS Checks – Full DNS Record Lookup](https://www.zero.xyz/c/domain-and-dns-checks-full-dns-record-lookup-3667e4d0/llms.txt): $0.03/call via x402. Fetches A, AAAA, NS, MX, TXT, and CAA records for a domain in a single call, including TTLs and domain existence status.
- [Email Authentication Check (SPF & DMARC)](https://www.zero.xyz/c/email-authentication-check-spf-dmarc-c53cbc6b/llms.txt): $0.03/call via x402. Parses and grades a domain's SPF and DMARC DNS records, assessing policy strength, configuration issues, and spoofing exposure.
- [MX Record Lookup and Mail Server Check](https://www.zero.xyz/c/mx-record-lookup-and-mail-server-check-cfb2925d/llms.txt): $0.03/call via x402. Returns the mail servers (MX records) for a domain ordered by priority, with DNS resolution status for each host, and handles null-MX and implicit-MX edge cases.
- [Domain Registration Lookup via RDAP](https://www.zero.xyz/c/domain-registration-lookup-via-rdap-1d7c79b1/llms.txt): $0.05/call via x402. Returns RDAP-based registration facts for a domain: registrar, creation/expiry dates, status codes, nameservers, age in days, and expiry flags.
- [DNSSEC Status Check](https://www.zero.xyz/c/dnssec-status-check-cba398e9/llms.txt): $0.03/call via x402. Returns DNSSEC validation status for a domain, including DS records at the parent, DNSKEY algorithms, and whether the resolver validated the answer.
- [CAA Record Lookup for Domain](https://www.zero.xyz/c/caa-record-lookup-for-domain-8a9afe48/llms.txt): $0.02/call via x402. Retrieves CAA (Certification Authority Authorization) DNS records for a domain, walking up to parent names, to show which CAs may issue certificates, wildcard rules, and reporting contacts.
- [Domain Parse – Label Splitting, Punycode & Lookalike Detection](https://www.zero.xyz/c/domain-parse-label-splitting-punycode-lookalike-detection-4bf57fbc/llms.txt): $0.02/call via x402. Parses a domain or URL into its constituent labels, registrable domain, and subdomain; converts punycode to unicode; and flags internationalized and lookalike traits.
- [Email Address Validation and Domain Mail Check](https://www.zero.xyz/c/email-address-validation-and-domain-mail-check-0e11b8c3/llms.txt): $0.03/call via x402. Validates an email address for syntax correctness, domain MX record existence, role account status, and disposable domain detection.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)