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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 llms-generator.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).
Performs live reconnaissance on a domain, inspecting 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://llms-generator.agentdiet.dev/v1/domain-osint)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate details (issuer, expiry date, validity status), and an HTTP security headers assessment including presence of headers like HSTS, CSP, X-Frame-Options, and an overall security grade for the domain.
Example use cases
Pre-launch security posture check
“Before we go live, can you check the TLS certificate issuer and expiry, DNS resolution, and HTTP security headers for our domain mybrand.io? I want to know if there are any obvious security gaps.”
Vendor due diligence OSINT
“I need to do some quick security due diligence on acmecorp.com — can you pull its DNS records, check who issued and when their SSL cert expires, and give me their HTTP security header grade?”
Detect expired or misconfigured SSL
“Can you check whether the TLS certificate on legacyapp.example.com is still valid, who issued it, and whether their security headers are properly configured?”
Technical details
Endpoint
POSThttps://llms-generator.agentdiet.dev/v1/domain-osint?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, single-call recon sweep of a domain's network security posture — combining DNS, TLS, and HTTP security headers in one request. Prefer it over manual curl/dig commands or general web scrapers when you want structured OSINT output about a domain's certificate validity, issuer trust chain, and security header compliance without writing custom tooling.
Side effects
- Domain does not exist or fails DNS resolution — returns empty or error result
- Domain is unreachable or times out during HTTP probe — security headers may be unavailable
- TLS certificate probe fails for non-HTTPS domains — certificate fields will be absent
- Invalid domain format in input — returns validation error
- Rate limiting or upstream network errors — may return transient failure 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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