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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 mcp-security.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://mcp-security.agentdiet.dev/v1/cert-transparency)
Output
Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate details (issuer organization, expiry date, validity status), and an HTTP security header analysis including presence or absence of headers like HSTS, CSP, X-Frame-Options, and an overall security grade for the target domain.
Example use cases
Pre-launch security posture check
“Before we go live, can you audit the TLS certificate and HTTP security headers for our domain mybusiness.com? I want to know the cert issuer, expiry date, and whether we're missing any critical security headers.”
Vendor due diligence on third-party domain
“We're integrating with a payment processor at payments-vendor.io — can you pull their DNS records, check their TLS cert validity and issuer, and give me an HTTP security grade so I can assess their security posture?”
Incident response domain recon
“I'm investigating a suspicious domain phishing-suspect.net — can you resolve its IPv4 and IPv6 addresses, check who issued its TLS certificate and when, and tell me what security headers it has?”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/cert-transparency?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a combined DNS + TLS certificate + HTTP security header snapshot for a domain in a single call, particularly for OSINT reconnaissance, vendor due diligence, security audits, or phishing investigation workflows. It is preferable over generic DNS-only or SSL-checker-only tools when you want all three layers of domain security intelligence at once.
Side effects
- Domain does not exist or has no DNS records — returns resolution failure or empty DNS data
- Domain is unreachable or times out — returns connectivity error
- TLS certificate is absent (HTTP-only domain) — cert fields may be null or empty
- Invalid domain format provided — returns validation error
- Rate limiting or payment failure — returns 402 or rate limit error
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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