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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 x402-audit.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 target 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://x402-audit.agentdiet.dev/v1/dns-whois-tls-recon)
Output
Returns live DNS resolution results including IPv4 and IPv6 addresses, TLS certificate metadata (issuer, subject, expiry dates, chain info), and an HTTP security header audit covering headers such as HSTS, CSP, X-Frame-Options, and an overall security grade for the target domain.
Example use cases
Pre-acquisition domain security due diligence
“We're evaluating acquiring a SaaS company — can you pull the DNS records, TLS certificate details, and HTTP security header grades for their main domain, openai.com, so I can assess their infrastructure hygiene?”
Competitor infrastructure OSINT sweep
“I want to do a quick OSINT check on stripe.com — what IPs it resolves to, who issued their TLS cert and when it expires, and whether they're using security headers like HSTS and CSP.”
SSL expiry alert before client site renewal
“Can you check the TLS certificate on shopify.com and tell me the exact expiry date and issuer so I can warn my client if it's about to lapse?”
Technical details
Endpoint
GEThttps://x402-audit.agentdiet.dev/v1/dns-whois-tls-recon?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, all-in-one passive recon snapshot of a domain's DNS posture, TLS certificate health, and HTTP security header configuration without running a full vulnerability scanner. It is ideal for security due diligence, OSINT reconnaissance, certificate expiry monitoring, and verifying web security hygiene on any publicly accessible domain.
Side effects
- Domain does not exist or fails DNS resolution — returns DNS lookup error
- TLS handshake failure or no HTTPS on the domain — certificate data unavailable
- Rate limiting or network timeout reaching the target — request may time out
- Invalid or malformed domain string input — returns validation error
- Target domain blocks or rate-limits the probe — incomplete header data returned
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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