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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 2026-10-21).
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://defi-yield.agentdiet.dev/v1/cert-transparency)
Output
Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate metadata (issuer CA, validity dates, expiry), and an HTTP security header assessment/grade for the queried domain.
Example use cases
Pre-launch security posture check
“Before we go live, can you audit our domain mycompany.com — check its DNS resolution, who issued our TLS cert and when it expires, and whether our HTTP security headers are properly configured?”
Investigating a suspicious phishing domain
“I got a suspicious email from someone claiming to be from secure-bank-login.com — can you run OSINT on that domain to check its DNS, TLS certificate details, and security headers so I can tell if it's legit?”
Vendor security due diligence
“We're onboarding a new SaaS vendor at vendorportal.io — can you pull their live DNS records, TLS certificate issuer and expiry, and HTTP security grade so I can include it in our security review?”
Technical details
Endpoint
GEThttps://defi-yield.agentdiet.dev/v1/cert-transparency?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, combined OSINT snapshot of a domain's DNS resolution, TLS certificate health, and HTTP security posture in a single call. Ideal for security due diligence, threat intelligence workflows, phishing domain investigation, or pre-deployment audits where you want DNS + TLS + headers in one response rather than querying separate tools.
Side effects
- Domain does not resolve — DNS lookup fails, returns error or empty record set
- Domain exists but has no HTTPS/TLS — certificate inspection returns null or error
- Firewall or WAF blocks probe — may return incomplete or timeout response
- Invalid domain format — API returns validation error
- Domain resolves but security headers are absent — grade reflects missing headers
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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