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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 hn-pulse.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 headers 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://hn-pulse.agentdiet.dev/v1/osint)
Output
Returns live DNS resolution data (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date), and an HTTP security headers grade/score for the queried domain, packaged as a JSON object.
Example use cases
Pre-launch security posture check
“Before we go live, can you audit the domain mystartup.io — check its DNS resolution, TLS certificate issuer and expiry, and give me an HTTP security headers grade so we can catch any gaps?”
Vendor domain due diligence
“I need to vet a new vendor — can you pull OSINT on their domain supplierco.com, including DNS IPs, who issued their TLS certificate, when it expires, and whether their security headers are solid?”
Certificate expiry monitoring alert
“Can you check openai.com's TLS certificate expiry date and tell me who the issuer is? I want to know if it's going to expire soon.”
Technical details
Endpoint
GEThttps://hn-pulse.agentdiet.dev/v1/osint?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, combined OSINT snapshot of a domain's DNS resolution, TLS certificate status, and HTTP security posture in a single API call, rather than running separate DNS, SSL checker, and header analysis tools. Especially useful for agent workflows that need to vet domains, monitor certificate health, or perform lightweight security reconnaissance without heavy vulnerability scanning infrastructure.
Side effects
- Domain does not exist or cannot be resolved — DNS lookup failure
- TLS certificate unreachable or domain has no HTTPS — certificate data may be absent
- Rate limiting or payment failure (HTTP 402) if payment is not processed
- Network timeout if the target domain is slow to respond
- Invalid domain format provided — validation error 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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