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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 mcp-security.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).
Performs live DNS resolution, TLS certificate inspection, and HTTP security header grading for any 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://mcp-security.agentdiet.dev/v1/domain-osint)
Output
Returns a structured object containing live IPv4/IPv6 DNS resolution results, TLS certificate details (issuer, validity dates, expiry), and an HTTP security headers analysis including presence and grading of headers such as HSTS, CSP, X-Frame-Options, and others.
Example use cases
Pre-launch security audit for new site
“Before we go live with acmecorp.com, can you check its TLS certificate issuer, expiry date, and whether it has proper security headers like HSTS and CSP set up?”
Investigating suspicious third-party domain
“We received an email from invoices-acme-pay.com and I want to know if it's legit — can you pull the DNS records, TLS cert details, and security header grade for that domain?”
Competitor infrastructure recon
“I'd like a quick security recon on openai.com — what are its IPv4 and IPv6 addresses, who issued its SSL certificate, when does it expire, and how does it score on security headers?”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/domain-osint?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, all-in-one passive recon snapshot of a domain's DNS posture, TLS certificate health, and HTTP security header configuration — especially for security audits, phishing domain triage, or pre-deployment checks. Prefer this over raw DNS lookup tools when you also need TLS cert and security header data in a single call.
Side effects
- Domain does not exist or fails DNS resolution — no records returned
- Domain is unreachable or times out during TLS handshake
- Domain does not serve HTTPS, so TLS certificate data is unavailable
- Invalid or malformed domain name input causing validation error
- Rate limiting or payment failure (HTTP 402) preventing the call from completing
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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