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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 serp-extract.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://serp-extract.agentdiet.dev/v1/subdomain-scan)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata including issuer and expiry date, and an HTTP security grade based on the domain's security headers — all collected in real time from the target domain.
Example use cases
Pre-launch security posture check
“Before we go live, can you audit the DNS records, TLS certificate, and HTTP security headers for our domain mybrand.io so I know if there are any issues?”
Third-party vendor due diligence
“I need to vet a new vendor — can you pull the TLS certificate details, DNS resolution, and security header grade for theirsite.com so I can assess their infrastructure security?”
Certificate expiry monitoring
“Can you check the TLS certificate for payments.acmecorp.com and tell me who issued it and when it expires? I want to make sure it's not about to lapse.”
Technical details
Endpoint
GEThttps://serp-extract.agentdiet.dev/v1/subdomain-scan?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, consolidated OSINT snapshot of a domain's DNS infrastructure, TLS certificate health, and HTTP security posture in a single call. It is ideal for security due diligence, pre-deployment checks, vendor assessments, or monitoring certificate expiry — especially when you want structured, agent-ready output rather than manual lookups across separate tools like dig, OpenSSL, or security header scanners.
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain is unreachable or times out — no TLS or header data returned
- Domain has no HTTPS — TLS certificate fields may be absent
- Invalid domain string provided — validation error returned
- Rate limiting or payment failure — HTTP 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | Maximum number of items to return per page (1-100) |
| cursor | string | Opaque pagination cursor for fetching the next page |
| 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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