Security — entry 007 of 30
Domain Intelligence
Domain Intelligence bundles DNS lookups, WHOIS/RDAP records, SSL certificate details, subdomain enumeration, and email-security posture (SPF/DKIM/DMARC auto-probed across common selectors) into a single parallel API call per domain. It's built and billed through RapidAPI, with a free Basic tier and metered overage pricing for higher-volume lookups. The combined response targets attack-surface reconnaissance and email-spoofing risk checks without stitching together several separate lookups yourself.
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<a href="https://greatapis.com/api/domain-intelligence/"><img src="https://greatapis.com/badge/domain-intelligence.svg" alt="Scored 61 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Developer reference
Free tier: 1,000 requests/month, no card required -- per oti-labs.com/domain-intelligence-api pricing comparison table