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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 x402broker.com, 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 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://x402broker.com/v1/asn-lookup)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security header grade reflecting the presence or absence of headers like HSTS, CSP, X-Frame-Options, and similar defensive headers.
Example use cases
Pre-vendor security due diligence
“Before we integrate with this new SaaS vendor, can you check the security posture of their domain api.vendorname.com — specifically their TLS certificate issuer, expiry date, and whether they have proper HTTP security headers configured?”
Incident response domain triage
“We're investigating a suspicious domain phishing.example.net — can you pull its DNS resolution, TLS certificate details, and security header grade so I can assess whether it looks like a threat actor's infrastructure?”
Certificate expiry monitoring
“Can you check whether the TLS certificate for our production domain myapp.io is still valid, who issued it, and when it's due to expire? Also grab the security header grade while you're at it.”
Technical details
Endpoint
GEThttps://x402broker.com/v1/asn-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, combined OSINT snapshot of a domain's DNS posture, TLS certificate health, and HTTP security configuration in a single call. It is ideal for security audits, vendor due diligence, certificate expiry checks, or threat intelligence triage where you need infrastructure-level signals about a domain without setting up your own scanning toolchain.
Side effects
- Domain does not exist or fails DNS resolution — returns empty or error response
- Domain is unreachable over HTTPS — TLS data unavailable
- Domain actively blocks probes — incomplete security header data returned
- Invalid domain string provided — input validation error
- Network timeout reaching the target domain — partial or no 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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