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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 (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://preflight.agentdiet.dev/v1/subdomain-scan)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata including issuer and expiry date, and an HTTP security header grade/score for the target domain.
Example use cases
Pre-deployment security audit
“Before we launch our new service on example.com, can you check its DNS resolution, TLS certificate details, and HTTP security headers to make sure everything looks solid?”
Competitor security posture check
“I want to understand the security setup of openai.com — can you pull its DNS records, SSL certificate issuer and expiry, and give me an HTTP security header grade?”
Incident response domain investigation
“We're seeing suspicious traffic from malicious-site.com — can you do a quick OSINT sweep on that domain to get its IP addresses, TLS cert details, and security header configuration?”
Technical details
Endpoint
GEThttps://preflight.agentdiet.dev/v1/subdomain-scan?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, live OSINT snapshot of a domain's DNS posture, TLS certificate health, and HTTP security header configuration in a single call. It is ideal for pre-launch audits, competitive intelligence, incident response triage, or verifying that a domain is properly secured before integrating with it.
Side effects
- Domain does not exist or is unresolvable — returns DNS resolution failure
- Domain has no HTTPS — TLS certificate fields may be empty or null
- Firewall or rate-limiting on the target domain blocks header inspection
- Invalid or malformed domain input — returns validation error
- Timeout if the target server is slow or unresponsive
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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