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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 email-verify.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 any 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://email-verify.agentdiet.dev/v1/tls-scanner)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate details including issuer and expiry date, and an HTTP security header grade reflecting the presence and quality of headers like HSTS, CSP, X-Frame-Options, and others.
Example use cases
Pre-launch security audit
“Before we go live, can you check our domain api.mycompany.com for its TLS certificate details, see what DNS addresses it resolves to, and give me the HTTP security headers grade?”
Competitor domain recon
“Run a quick domain OSINT scan on stripe.com — I want to see their TLS certificate issuer and expiry, IPv4/IPv6 DNS records, and how their security headers score.”
Certificate expiry monitoring
“Can you check whether the TLS certificate on payments.acme.io is about to expire and who issued it?”
Technical details
Endpoint
GEThttps://email-verify.agentdiet.dev/v1/tls-scanner?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, all-in-one OSINT snapshot of a domain's DNS, TLS certificate, and HTTP security posture without standing up your own scanning infrastructure. It is especially useful for security audits, pre-launch checks, vendor due diligence, or competitive reconnaissance where you need live data rather than cached registry information.
Side effects
- Domain does not exist or cannot be resolved — DNS lookup fails with an error
- Domain is unreachable or times out — TLS/HTTP scan returns a timeout error
- Invalid domain format provided — API returns a validation error
- Domain resolves but has no HTTPS endpoint — TLS certificate data may be absent
- Rate limiting or payment failure — 402 payment required error
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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