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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 agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).
Performs live DNS resolution, TLS certificate inspection, and HTTP security header analysis 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://agentdiet.dev/v1/cert-transparency)
Output
Returns live DNS resolution results (IPv4 and/or IPv6 addresses), TLS certificate metadata including issuer name and expiry date, and an HTTP security header grade summarizing the presence and quality of headers like HSTS, CSP, X-Frame-Options, and others for the queried domain.
Example use cases
Pre-vendor security due diligence
“Before we sign a contract with this vendor, can you pull the TLS certificate details, DNS records, and security header grade for their domain vendorco.com so I can assess their security posture?”
Monitor competitor SSL expiry
“Check when the SSL certificate for openai.com expires and who issued it — I want to know if they're due for a renewal soon.”
Debug missing security headers
“Can you inspect the HTTP security headers for myblog.io and tell me what grade it gets? I think we're missing HSTS and CSP headers.”
Technical details
Endpoint
GEThttps://agentdiet.dev/v1/cert-transparency?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, live OSINT snapshot of a domain's DNS configuration, TLS certificate health, and HTTP security posture in a single call. It is ideal for security audits, vendor due diligence, competitive intelligence, or monitoring certificate expiry without needing to run separate DNS, SSL, and header tools.
Side effects
- Domain does not exist or fails DNS resolution — no IP addresses returned
- Domain has no TLS certificate (HTTP-only) — certificate fields absent or error
- Domain is unreachable or firewalled — timeout or connection error
- Invalid domain format provided — validation error
- Domain resolves but returns no HTTP response for header analysis
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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