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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 llms-generator.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).
Performs live reconnaissance on a domain, inspecting IPv4/IPv6 DNS resolution, TLS certificate issuer and expiry, and HTTP security header grading.
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://llms-generator.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 headers grade reflecting the presence or absence of headers like HSTS, CSP, X-Frame-Options, etc.
Example use cases
SSL certificate expiry monitoring
“Check the TLS certificate for stripe.com — who issued it, and when does it expire? I want to make sure it's not about to lapse.”
Vendor security posture check
“Before we onboard this vendor, can you do a security recon on their domain thirdpartyvendor.io — I need their DNS resolution, TLS cert details, and HTTP security header grade.”
Phishing domain investigation
“I got a suspicious email from someone claiming to be at paypa1.com — can you run a DNS and TLS recon on that domain so I can see what's actually behind it?”
Technical details
Endpoint
GEThttps://llms-generator.agentdiet.dev/v1/dns-whois-tls-recon?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time, live OSINT data on a domain's DNS, TLS, and HTTP security posture in a single call — especially useful for security analysts, threat intelligence workflows, vendor due diligence, phishing investigation, or certificate expiry monitoring. Prefer this over static WHOIS-only tools when you need TLS issuer/expiry and security header grading alongside DNS resolution.
Side effects
- Domain does not exist or fails DNS resolution — returns empty or error response
- Domain is unreachable at time of query — TLS and header data unavailable
- Domain has no TLS certificate — cert fields returned as null or empty
- Invalid domain format provided — validation error returned
- Rate limiting or payment failure (HTTP 402) — request blocked
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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