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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 OSINT on a domain by inspecting its IPv4/IPv6 DNS resolution, TLS certificate issuer and expiry, and HTTP security header grade
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/osint)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata including issuer and expiration date, and an HTTP security header grade reflecting the presence or absence of security headers such as HSTS, CSP, and X-Frame-Options.
Example use cases
Pre-vendor security due diligence
“Before we integrate with this vendor, can you check their domain security? Run OSINT on acmecorp.com — I want to see their DNS records, who issued their TLS cert and when it expires, and what their HTTP security grade looks like.”
SSL certificate expiry monitoring
“Can you check when the TLS certificate for stripe.com expires and who issued it? I want to make sure we get an alert before it lapses.”
Competitor domain infrastructure recon
“I'm doing competitive research — can you pull the DNS resolution, TLS certificate details, and HTTP security header grade for openai.com so I can see how their infrastructure stacks up?”
Technical details
Endpoint
GEThttps://preflight.agentdiet.dev/v1/osint?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, single-call OSINT snapshot of a domain's DNS, TLS, and HTTP security posture without building multiple separate DNS, certificate, and header-check integrations. It's ideal for security due diligence workflows, pre-integration vendor checks, certificate expiry monitoring, and competitive infrastructure reconnaissance. Prefer it over manual curl/dig commands or multiple specialized APIs when you want consolidated domain intelligence in one response.
Side effects
- Domain does not exist or fails DNS resolution — returns an error or empty DNS records
- Domain has no TLS certificate — certificate fields will be null or missing
- Domain is unreachable or times out — network error response
- Invalid or malformed domain input — validation error with descriptive message
- Domain blocks automated HTTP probes — security headers may be incomplete or unavailable
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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