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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 domain-osint.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).
Performs live DNS resolution, TLS certificate inspection, and HTTP security header grading for a given domain name.
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://domain-osint.agentdiet.dev/v1/asn-lookup)
Output
Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate details (issuer, expiry date, validity status), and an HTTP security header audit including a security grade, for the queried domain.
Example use cases
Vendor security due diligence check
“Before we integrate with this new payments vendor, can you check their domain paymentco.io for DNS resolution, TLS certificate issuer and expiry, and whether they have proper HTTP security headers set up?”
Suspicious domain phishing investigation
“I got an email from support@secure-banklogin.net — can you run OSINT on that domain to check its DNS, who issued its TLS cert, when it expires, and whether it looks legit based on its security headers?”
Pre-launch SSL and security headers audit
“We're about to launch our new site at myapp.io — can you verify the DNS is resolving correctly to both IPv4 and IPv6, confirm our TLS certificate is valid and from a trusted issuer, and grade our HTTP security headers?”
Technical details
Endpoint
GEThttps://domain-osint.agentdiet.dev/v1/asn-lookup?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, unified view of a domain's DNS resolution, TLS certificate health, and HTTP security posture in a single call. It is ideal for OSINT investigations, security audits, vendor due diligence, and phishing triage where you need live certificate and header data rather than historical WHOIS records.
Side effects
- Domain does not exist or fails DNS resolution — no IP data returned
- Domain has no TLS certificate (HTTP-only) — certificate fields absent
- Domain times out during live probing — timeout or connectivity error
- Invalid domain format input — validation error returned
- Domain blocks probing requests — partial or empty 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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