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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-compiler.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 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-compiler.agentdiet.dev/v1/subdomain-scan)
Output
Returns a structured object containing live IPv4/IPv6 DNS resolution results, TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security headers grade or breakdown for the queried domain.
Example use cases
Vendor security due diligence
“Before we onboard this new SaaS vendor, can you check the security posture of their domain vendor-portal.example.com — I want to see the TLS cert issuer, when it expires, and how their HTTP security headers grade?”
SSL certificate expiry monitoring
“Can you check the TLS certificate on our staging site staging.myapp.io and tell me the expiry date and who issued it? I want to know if it's about to expire.”
Phishing domain investigation
“We got a suspicious email from what looks like login-microsofft.com — can you do a security OSINT scan on that domain and tell me the DNS resolution, TLS cert issuer, and security header grade?”
Technical details
Endpoint
GEThttps://mcp-compiler.agentdiet.dev/v1/subdomain-scan?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, combined OSINT snapshot of a domain's DNS posture, TLS certificate health, and HTTP security header grade in a single call — particularly useful for security audits, vendor assessments, phishing investigations, or certificate expiry checks. Prefer this over raw DNS or SSL checkers when you want all three signals in one response without stitching multiple tools together.
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain has no TLS certificate (HTTP only) — TLS fields may be null or absent
- Connection timeout if the target domain is unresponsive
- Invalid domain format provided — likely a 400 validation error
- Rate limiting or payment failure (x402) — 402 response requiring payment
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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