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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 serp-extract.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 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://serp-extract.agentdiet.dev/v1/cert-transparency)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date), and an HTTP security header grade/analysis for the queried domain.
Example use cases
Pre-deployment SSL certificate audit
“Before we go live, can you check the TLS certificate details for myapp.example.com — I need the issuer, expiry date, and whether it resolves on both IPv4 and IPv6?”
Vendor security due diligence
“I'm onboarding a new SaaS vendor at vendor-portal.thirdparty.io — can you run a security recon on that domain and tell me their cert issuer, expiry, and HTTP security header grade?”
Phishing domain investigation
“We got a suspicious link pointing to secure-login.bankofexample.net — can you check its DNS resolution, who issued the TLS certificate, and what security headers it has?”
Technical details
Endpoint
GEThttps://serp-extract.agentdiet.dev/v1/cert-transparency?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a combined OSINT snapshot of a domain's DNS resolution, TLS certificate health, and HTTP security posture in a single call — particularly useful for security audits, vendor due diligence, phishing investigation, or pre-deployment certificate checks. Prefer this over generic WHOIS tools when TLS cert transparency and security header grading are specifically required.
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS results
- Domain has no TLS certificate (HTTP-only) — certificate fields may be null or absent
- Unreachable host or firewall blocking inspection — may return timeout or partial data
- Invalid domain string input — returns validation error
- Domain exists but has no resolvable IPv6 address — IPv6 field may be empty
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | Maximum number of items to return per page (1-100) |
| cursor | string | Opaque pagination cursor for fetching the next page |
| 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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