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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 preflight.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://preflight.agentdiet.dev/v1/subdomain-scan)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate details (issuer, expiry date, validity), and an HTTP security header assessment or grade for the target domain.
Example use cases
SSL certificate expiry monitoring
“Check openai.com's TLS certificate — who issued it, when does it expire, and is it still valid?”
Pre-acquisition domain due diligence
“I'm evaluating a company and want to know if their domain acmecorp.io has proper DNS setup, a valid SSL cert, and decent HTTP security headers before we proceed.”
Competitor infrastructure OSINT
“Do a quick security recon on competitor.com — I want their IPv4 and IPv6 addresses, TLS cert details, and their HTTP security grade.”
Technical details
Endpoint
GEThttps://preflight.agentdiet.dev/v1/subdomain-scan?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need live, real-time DNS resolution, TLS certificate inspection, and HTTP security header analysis for a specific domain in a single call. It is ideal for security audits, OSINT reconnaissance, pre-acquisition due diligence, monitoring certificate expiry, or verifying infrastructure posture — especially when you want all three signals (DNS, TLS, headers) in one request rather than querying separate tools.
Side effects
- Domain does not exist or fails to resolve — DNS lookup returns no records
- Domain's HTTPS is not configured — TLS certificate data unavailable
- Domain blocks or throttles external probes — incomplete header data returned
- Invalid or malformed domain string input — request rejected with validation error
- Transient network error during live probe — partial or empty response
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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