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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 (IPv4/IPv6), TLS certificate inspection (issuer, expiry), and HTTP security headers 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://mcp-security.agentdiet.dev/v1/whois-lookup)
Output
Returns live DNS resolution results including IPv4 and IPv6 addresses, TLS certificate metadata (issuer, subject, expiry date), and an HTTP security headers assessment/grade for the target domain.
Example use cases
Pre-launch security posture check
“Before we go live, can you audit openai.com's TLS certificate issuer and expiry date, and tell me how its HTTP security headers are graded? I want to make sure our own setup is comparable.”
Vendor due diligence security review
“I'm vetting a new SaaS vendor at stripe.com — can you pull their DNS resolution, TLS certificate details, and HTTP security header score so I can include it in the security review?”
Monitoring competitor infrastructure
“Run a domain OSINT recon on competitor.io and give me their IPv4/IPv6 DNS records, TLS certificate info, and security headers grade — I want a full picture of their infrastructure.”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/whois-lookup?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, all-in-one passive recon snapshot of a domain's DNS posture, TLS certificate validity, and HTTP security header configuration — especially useful for vendor assessments, pre-launch audits, or security OSINT workflows that need structured results without running a full port scan or active penetration test.
Side effects
- Domain does not exist or fails DNS resolution — returns an error or empty DNS records
- TLS certificate unreachable or domain serves no HTTPS — TLS fields may be null or error out
- Firewall or rate limiting blocks HTTP header fetch — security grade may be unavailable
- Invalid or malformed domain input — returns validation error
- Timeout if target domain is slow to respond
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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