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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 serp-extract.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 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://serp-extract.agentdiet.dev/v1/asn-lookup)
Output
Returns live IPv4 and IPv6 DNS resolution results, TLS certificate issuer and expiry details, and an HTTP security header grade for the queried domain, packaged as a structured JSON object.
Example use cases
Certificate expiry monitoring for SaaS
“Check when the TLS certificate for stripe.com expires and who issued it — I want to make sure it's not about to lapse.”
Security header audit before launch
“Before we go live, can you audit the HTTP security headers on staging.myapp.io and tell me what the security grade looks like?”
Domain OSINT during due diligence
“I'm vetting a vendor — can you pull the DNS records, TLS cert details, and HTTP security posture for vendor-platform.com so I can assess their infrastructure?”
Technical details
Endpoint
GEThttps://serp-extract.agentdiet.dev/v1/asn-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single-call, live OSINT snapshot covering DNS (IPv4/IPv6), TLS certificate metadata, and HTTP security header grading for a domain — especially useful for security audits, vendor due diligence, certificate monitoring, or reconnaissance workflows where you want correlated infrastructure signals in one response rather than calling separate DNS, SSL, and header tools independently.
Side effects
- Domain does not exist or fails DNS resolution — returns empty or error response
- Domain has no TLS certificate (HTTP-only) — certificate fields may be null or absent
- Firewall or CDN blocking probe requests — may return incomplete or timeout responses
- Invalid domain format supplied — API may return a validation error
- Transient network issues causing lookup failures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | Maximum number of items to return per page (1-100) |
| cursor | string | Opaque pagination cursor for fetching the next page |
| 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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