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Domain OSINT, TLS Certificate & Security Headers Recon
Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from email-verify.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).
Inspects a domain's live DNS resolution (IPv4/IPv6), TLS certificate issuer and expiry, and HTTP security header grade for reconnaissance and risk assessment.
Price / call$0.01
Success—
StatusUnknown
How this service works
Inspects live IPv4/IPv6 DNS resolution, TLS certificate issuer/expiry, and HTTP security grade. (Live x402 v2, IETF MPP & MCP endpoint at https://email-verify.agentdiet.dev/v1/whois-lookup)
Output
Returns live IPv4 and IPv6 DNS resolution results, TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security header grade for the queried domain, enabling rapid security posture assessment and infrastructure reconnaissance.
Example use cases
Vendor security due diligence check
“Before we integrate with that new SaaS vendor at stripe.com, can you pull their DNS resolution, TLS certificate details, and HTTP security header grade so I can include it in my due diligence report?”
SSL certificate expiry monitoring
“Check openai.com's TLS certificate right now — who issued it and how many days until it expires? I need to know if we're at risk of it lapsing soon.”
Domain infrastructure OSINT for phishing investigation
“I'm investigating a suspicious domain, paypa1.com — can you do a full OSINT recon on it: live IPv4 and IPv6 resolution, TLS certificate issuer and expiry, and HTTP security header score?”
Technical details
Endpoint
GEThttps://email-verify.agentdiet.dev/v1/whois-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a combined DNS + TLS + security header snapshot of a domain in a single call, particularly for security due diligence, OSINT investigations, certificate expiry checks, or vendor risk assessments. Prefer this over raw WHOIS tools when you specifically need live resolution and TLS certificate metadata together rather than registrar ownership records.
Side effects
- Domain does not exist or fails DNS resolution — returns an error or empty DNS fields
- Domain has no TLS certificate (HTTP-only) — TLS fields may be null or absent
- Domain is unreachable or times out — may return a timeout or partial result
- Invalid domain string format — returns a validation error
- Rate limiting or payment failure — returns HTTP 402 or 429
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domainrequired | string | Target domain name (e.g. anthropic.com, openai.com) for DNS, TLS certificate, and security header OSINT |
Output
Schema · Response
{
"type": "object"
}Reviews
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