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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, and HTTP security header 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/dns-recon)
Output
Returns live IPv4 and IPv6 DNS resolution results, TLS certificate metadata (issuer, expiry date, validity), and an HTTP security header grade reflecting presence or absence of headers like HSTS, CSP, X-Frame-Options, and similar security controls for the queried domain.
Example use cases
Pre-acquisition domain security check
“Before we finalize this acquisition, can you run a full DNS, TLS certificate, and HTTP security header audit on acmecorp.com so I can see any glaring security issues?”
Monitoring competitor SSL expiry
“Check when the TLS certificate for competitor.io expires and who issued it — I want to know if they're running on a short-lived cert or a commercial CA.”
Vendor security due diligence
“We're onboarding a new SaaS vendor at vendor-platform.com — can you check their DNS records, TLS certificate details, and HTTP security header grade so I can include it in our due diligence report?”
Technical details
Endpoint
GEThttps://mcp-security.agentdiet.dev/v1/dns-recon?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need live, real-time DNS resolution combined with TLS certificate inspection and HTTP security header grading in a single call. Prefer it over manual dig/whois lookups or separate TLS scanners when an agent needs consolidated domain security intelligence for OSINT, due diligence, vendor assessment, or security audits.
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain unreachable over HTTPS — TLS certificate data unavailable
- Non-existent or expired domain — may return partial data
- Rate limiting or payment failure (HTTP 402) — request blocked
- Timeout on live network probe — partial or no results returned
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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