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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 defi-yield.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).
Given a domain name, inspects live DNS resolution (IPv4/IPv6), TLS certificate issuer and expiry, and HTTP security header grades via active probing.
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://defi-yield.agentdiet.dev/v1/cert-transparency)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security headers analysis including grades for headers like HSTS, CSP, X-Frame-Options, and similar security directives for the queried domain.
Example use cases
Pre-pentest domain recon
“Before I start a security assessment, can you pull the live DNS records, TLS certificate issuer and expiry, and HTTP security header grade for acmecorp.com so I know what I'm working with?”
Certificate expiry monitoring
“I need to check whether the TLS certificate for api.mycompany.com is about to expire — can you look up who issued it and exactly when it expires?”
Vendor security due diligence
“We're about to onboard a new vendor and I want to know if their site, vendorexample.com, has proper security headers like HSTS and CSP, and whether their SSL cert is from a trusted issuer.”
Technical details
Endpoint
POSThttps://defi-yield.agentdiet.dev/v1/cert-transparency?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a real-time, active probe of a domain's DNS resolution, TLS certificate details, and HTTP security headers in a single call — ideal for security audits, OSINT reconnaissance, certificate expiry checks, or vendor due diligence. Prefer it over passive certificate transparency log searches when you need live, current state rather than historical issuance records.
Side effects
- Domain does not exist or fails DNS resolution — may return error or empty DNS fields
- Domain is unreachable over HTTP/HTTPS — security headers cannot be fetched
- TLS certificate is self-signed or absent — issuer/expiry may be null or flagged
- Invalid domain input (e.g. bare IP, malformed string) — validation error returned
- Timeout on live probing if the target server is slow or firewalled
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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