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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 reconnaissance on a domain including IPv4/IPv6 DNS resolution, TLS certificate issuer and expiry details, and HTTP security header grading.
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/osint)
Output
Returns live DNS resolution data (IPv4 and IPv6 addresses), TLS certificate details including issuer and expiry date, and an HTTP security header grade reflecting the presence or absence of headers like HSTS, CSP, X-Frame-Options, and similar security controls.
Example use cases
Vendor security vetting before integration
“Before we integrate with this third-party API, can you check openai.com for its DNS setup, TLS certificate details, and HTTP security header grade so I can assess their security posture?”
Certificate expiry alert for own domain
“Can you inspect mycompany.com and tell me when the TLS certificate expires and who issued it? I want to make sure we're not about to get caught with an expired cert.”
OSINT recon on suspicious domain
“I came across a sketchy-looking domain called suspicious-site.io — can you pull its DNS resolution, TLS cert info, and security header grade to help me figure out if it's legit?”
Technical details
Endpoint
GEThttps://x402-audit.agentdiet.dev/v1/osint?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, live reconnaissance snapshot of a domain's DNS posture, TLS certificate health, and HTTP security header configuration without running a full vulnerability scan. It is ideal for passive security assessments, vendor due diligence, certificate expiry monitoring, and domain OSINT investigations where you need structured, machine-readable results at low cost ($0.01/call).
Side effects
- Domain does not exist or fails DNS resolution — returns error indicating unresolvable domain
- Domain has no TLS certificate (HTTP-only) — TLS fields may be null or absent
- Network timeout reaching the target domain — may return partial results or timeout error
- Invalid domain format supplied — returns validation error
- Domain is reachable but blocks external probes — security headers may be incomplete
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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