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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 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://llms-generator.agentdiet.dev/v1/cert-transparency)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate details including issuer identity and expiry date, and an HTTP security header grade assessing the domain's security posture.
Example use cases
Vendor security due diligence check
“Before we onboard this new SaaS vendor, can you inspect their domain paymentco.io — check their DNS records, who issued their TLS cert, when it expires, and what their HTTP security header grade looks like?”
Certificate expiry monitoring for ops
“Check the TLS certificate on api.mycompany.com — I need to know who issued it, the exact expiry date, and whether our HTTP security headers are up to grade before the quarterly review.”
Competitive OSINT on a rival domain
“Run a recon sweep on competitor.com — I want their live IPv4 and IPv6 DNS resolution, TLS certificate issuer and expiry, and an HTTP security grade so I can benchmark it against our own setup.”
Technical details
Endpoint
GEThttps://llms-generator.agentdiet.dev/v1/cert-transparency?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single call to gather combined DNS, TLS certificate, and HTTP security header intelligence about a domain — especially for security audits, vendor due diligence, OSINT investigations, or monitoring certificate expiry. It is particularly useful when you need live resolution data rather than cached or historical records.
Side effects
- Domain does not exist or is unresolvable — DNS lookup fails with an error
- Domain is unreachable or times out — TLS/HTTP inspection cannot complete
- Invalid or malformed domain string provided — validation error returned
- Domain resolves but has no TLS certificate (HTTP-only) — certificate fields may be null or absent
- Temporary network issues causing incomplete results for DNS or TLS layers
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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