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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 (IPv4/IPv6), TLS certificate inspection, and HTTP security header grading for a 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://agentdiet.dev/v1/asn-lookup)
Output
Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security header grade or breakdown for the queried domain.
Example use cases
Vendor security due diligence check
“Before we integrate with this new vendor, can you check the domain security posture of acmecorp.io — specifically their TLS certificate issuer, expiry date, and whether their HTTP security headers are up to standard?”
SSL certificate expiry monitoring
“I need to know when the TLS certificate for mybusiness.com expires and who issued it — can you pull that info so I can plan renewal before it lapses?”
Competitor infrastructure OSINT
“Can you do an OSINT recon on competitor.com and tell me their IPv4 and IPv6 DNS resolution, TLS certificate details, and HTTP security header grade?”
Technical details
Endpoint
GEThttps://agentdiet.dev/v1/asn-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single-call passive recon of a domain's DNS, TLS certificate health, and HTTP security headers without deploying your own scanning infrastructure. It is especially useful for security due diligence, certificate expiry checks, vendor assessments, and lightweight OSINT workflows where you need structured, live data about a domain's security posture at low cost ($0.01/call).
Side effects
- Domain does not exist or is unresolvable — returns DNS resolution failure
- TLS certificate is absent or self-signed — may return incomplete cert data
- Domain blocks HTTP probes — security header analysis may be unavailable
- Invalid domain format provided — returns validation error
- Timeout reaching the target domain — may return partial results
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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