Domain Health Checker – Expiry, DNS, SPF/DMARC, SSL, HSTS
Pricing
from $4.00 / 1,000 domain checkeds
Bulk-check domains: expiry and registrar via RDAP (no WHOIS personal data), A/AAAA/MX/NS/CAA, SPF validity and lookup count, DMARC policy, common DKIM selectors, SSL certificate (issuer, days to expiry, hostname match, TLS version), HTTP→HTTPS redirect and HSTS. Health score 0–100 with fix codes.
Domain names (example.com) or URLs (https://www.example.com/page); the domain is extracted and a leading www. removed. Up to 500 per run. IP addresses, localhost and internal names are rejected.
Query the registry's official RDAP service (via the IANA bootstrap). Only registry facts are kept: registrar name and IANA ID, created/expiry/last-changed dates, status, nameservers, DNSSEC. No registrant/contact data is read or stored.
One TLS handshake on port 443 plus a few header-only HTTP requests to the home page (http:// and https://, at most 5 redirects). No page content is downloaded or stored.
DKIM cannot be verified without knowing the selector. If on, 10 common selectors (google, selector1, selector2, default, k1, s1, s2, dkim, mail, smtp) are tried. Not finding one is informational only and does not lower the score.
Each domain's own requests are sequential; RDAP servers get at most one request at a time with ≥1 s between requests.
