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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 company-enrich.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).
Performs live DNS resolution (IPv4/IPv6), TLS certificate inspection (issuer, expiry), and HTTP security header grading for a given domain.
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://company-enrich.agentdiet.dev/v1/whois-lookup)
Output
Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate metadata (issuer, subject, expiry date), and an HTTP security header audit including a security grade, covering headers like HSTS, CSP, X-Frame-Options, and similar protective response headers.
Example use cases
Vendor security due diligence check
“Before we onboard this SaaS vendor, can you inspect openai.com for its TLS certificate issuer and expiry, IPv4/IPv6 DNS resolution, and HTTP security header grade so I can assess their security posture?”
SSL expiry alert before renewal
“Check when the TLS certificate for stripe.com expires and who issued it — I want to make sure it's not about to lapse before we renew our partnership contract.”
Competitor domain OSINT recon
“Run a domain OSINT recon on competitor.com — pull their DNS IP addresses, TLS cert details, and HTTP security headers so I can compare their infrastructure posture to ours.”
Technical details
Endpoint
GEThttps://company-enrich.agentdiet.dev/v1/whois-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a live, real-time snapshot of a domain's DNS resolution, TLS certificate health, and HTTP security configuration in a single call. It is ideal for security due diligence, vendor assessments, pre-engagement OSINT, and certificate expiry monitoring. Prefer it over static WHOIS-only tools when you need TLS issuer/expiry details and HTTP security grading alongside DNS records.
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS fields
- Domain has no TLS certificate (HTTP-only) — TLS fields may be null or absent
- Target host times out during live HTTP probe — security header results unavailable
- Malformed or missing domain parameter — API returns 400 bad request
- Network-level block prevents live TLS handshake — partial results returned
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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