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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 sec-intel.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, and HTTP security header grading for a given domain name.
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://sec-intel.agentdiet.dev/v1/dns-recon)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity), and an HTTP security header assessment including presence and grade of headers like HSTS, CSP, X-Frame-Options, and an overall security grade for the domain.
Example use cases
SSL certificate expiry monitoring
“Check when the TLS certificate for stripe.com expires and who issued it — I want to know if it's close to renewal time.”
Security posture audit before vendor onboarding
“Before we onboard this vendor, can you run a DNS and security headers recon on their domain acme-vendor.io and tell me if they have proper HSTS and a good security grade?”
Domain infrastructure OSINT investigation
“I'm researching a suspicious domain — can you do a full DNS resolution and TLS certificate inspection on shadysite.net to see who's behind it and what their cert details look like?”
Technical details
Endpoint
GEThttps://sec-intel.agentdiet.dev/v1/dns-recon?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need live, real-time reconnaissance on a domain's DNS resolution, TLS certificate validity, and HTTP security configuration in a single call. It is ideal for security audits, vendor due diligence, certificate expiry monitoring, or OSINT investigations where you want a combined DNS + TLS + security headers snapshot without chaining multiple separate lookups.
Side effects
- Domain does not resolve — DNS lookup returns no records, empty or error response
- Domain is unreachable over HTTPS — TLS handshake fails, certificate data unavailable
- Invalid domain format provided — missing or malformed domain string returns validation error
- Domain uses HTTP only — no TLS certificate data available
- Timeout on live probe — domain responds too slowly, 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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