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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 2026-10-23).
Given a domain name, inspects live DNS resolution (IPv4/IPv6), TLS certificate issuer/expiry, and HTTP security header grade for OSINT and security analysis.
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 structured OSINT data including live IPv4 and IPv6 DNS resolutions, TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security header grade/score for the target domain.
Example use cases
Vendor security due diligence check
“Before we integrate with this new vendor, can you check the domain security posture of acme-vendor.com — specifically their TLS cert issuer, expiry, whether it's expired or about to, and what their HTTP security header grade looks like?”
SSL certificate expiry monitoring
“Can you look up the TLS certificate details for mybusiness.com and tell me when the cert expires and who issued it? I want to know if it's going to expire soon.”
Competitor infrastructure reconnaissance
“Do a domain OSINT scan on competitor.io — I need to know their live IPv4 and IPv6 DNS records, who issued their TLS cert, and how their HTTP security headers score.”
Technical details
Endpoint
POSThttps://serp-extract.agentdiet.dev/v1/asn-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need combined DNS, TLS certificate, and HTTP security header intelligence for a domain in a single call, particularly for OSINT workflows, security audits, vendor assessments, or certificate expiry monitoring. Prefer it over general-purpose DNS or SSL tools when you want all three data layers (DNS, TLS, security headers) in one lookup without stitching together multiple APIs.
Side effects
- Domain does not resolve — DNS lookup returns no records, no IP addresses returned
- Domain is unreachable — TLS handshake or HTTP connection times out
- Invalid domain input — malformed or empty domain string returns validation error
- Domain has no TLS certificate — HTTP-only site returns no cert data
- Rate limiting or payment failure — 402 response if payment is not properly attached
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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