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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).
Performs live DNS resolution (IPv4/IPv6), TLS certificate inspection (issuer, expiry), and HTTP security header grading for any target 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://email-verify.agentdiet.dev/v1/cert-transparency)
Output
Returns live DNS resolution data (IPv4/IPv6 addresses), TLS certificate details (issuer, validity period, expiry date), and an HTTP security grade based on presence and configuration of security headers such as HSTS, CSP, X-Frame-Options, and similar directives.
Example use cases
SSL expiry check before deployment
“Check the TLS certificate for stripe.com — I want to know who issued it and when it expires before we go live with our integration.”
Security posture audit for vendor vetting
“We're onboarding a new SaaS vendor at salesforce.com — can you pull their DNS records, TLS cert info, and HTTP security grade so I can include it in the risk assessment?”
Competitor domain recon for security research
“Run an OSINT check on openai.com for me — I need to see their IPv4 and IPv6 DNS resolution, TLS certificate issuer and expiry, and their overall HTTP security header score.”
Technical details
Endpoint
GEThttps://email-verify.agentdiet.dev/v1/cert-transparency?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, all-in-one OSINT snapshot of a domain covering DNS, TLS certificate, and HTTP security posture in a single call. It is ideal for security audits, vendor due diligence, certificate expiry monitoring, and competitive recon — especially when you need live data rather than cached records. Prefer it over raw DNS tools when you also need TLS and security header context in one response.
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain has no HTTPS/TLS — TLS certificate fields may be absent or null
- Firewall or rate-limiting blocks live HTTP probe — security headers may be unavailable
- Invalid domain format supplied — returns validation error
- Domain resolves but HTTP server is down — partial results with DNS only
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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