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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 preflight.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 analysis 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://preflight.agentdiet.dev/v1/dns-whois-tls-recon)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security grade based on observed security headers (e.g. HSTS, CSP, X-Frame-Options). Useful for rapid infrastructure recon and security posture assessment.
Example use cases
Pre-vendor security due diligence
“Before we sign a contract with this SaaS vendor, can you check their domain securevendor.io — I want to see their DNS setup, TLS cert issuer and expiry, and whether their HTTP security headers are up to scratch?”
Monitoring competitor SSL expiry
“Can you check openai.com's TLS certificate details — specifically when it expires and who issued it — so I can track whether they let it lapse?”
Incident response domain investigation
“We're seeing suspicious traffic from suspicious-site.net — can you pull the live DNS resolution, TLS cert info, and HTTP security grade so I can assess their infrastructure?”
Technical details
Endpoint
GEThttps://preflight.agentdiet.dev/v1/dns-whois-tls-recon?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a combined, live snapshot of a domain's DNS records, TLS certificate health, and HTTP security header posture in a single call. Ideal for OSINT workflows, vendor risk assessments, incident response triage, and compliance checks where manual inspection would be slow. Prefer this over separate DNS-only or TLS-only tools when you want a unified security summary without stitching together multiple API calls.
Side effects
- Domain does not exist or fails DNS resolution — no records returned
- Domain has no HTTPS/TLS — certificate fields absent or error
- Firewall or rate-limiting blocks probe — partial or empty results
- Invalid domain format provided — validation error
- Target server unreachable or times out — timeout error
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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