Meet ProbeDeck
A domain intelligence API. One endpoint, every signal. Hit any URL — get back WHOIS, DNS, SSL state, HTTP headers, detected tech stack, favicon and meta tags in a single REST call. Eight probes, run in parallel, merged into one JSON document.
What it does
/v1/inspect runs every probe in parallel and returns a merged document. Or call any probe on its own when that's all you need.
Registrar, registration and expiry dates, nameservers and status. Full record set across A, AAAA, MX, TXT, NS, CNAME, SOA and CAA. Certificate subject, issuer, SANs, validity window, days left and chain validity.
Status, full redirect chain, and a scored security posture across HSTS, CSP, X-Frame-Options and the rest — one number you can threshold on.
Signature-based CMS, framework, CDN and analytics detection. Title, description, OG and Twitter tags, canonical, lang and hreflang. Best icon resolved from link tags, manifest and fallback.
Every probe carries its own status. One unreachable WHOIS server doesn't cost you the other seven results — you get what resolved plus a summary of what didn't.
Targets resolved before the request leaves the box. Private ranges, loopback, link-local and cloud metadata endpoints rejected automatically.
Repeat lookups come back from cache, from 10 minutes for headers up to 24 hours for favicons. The response tells you when it was cached, add nocache=1 when you need a fresh read, and failed probes are never cached.
One lookup, a lot of uses
If your app ever needs to know something about a website, ProbeDeck saves you from writing and babysitting eight different lookups.
Free forever on Basic. Every paid tier starts with 14 days free.
API keys, plans and billing are handled through RapidAPI. No card on the free tier. Cancel any paid tier at any time.
Keys through RapidAPI · Docs at probedeck.dev · Built by Evolution IT Services