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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/asn-lookup)
Output
Returns live DNS resolution data (IPv4/IPv6 addresses), TLS certificate details (issuer, expiry date, validity status), and an HTTP security header grade/analysis for the queried domain.
Example use cases
Pre-vendor security due diligence
“Before we integrate with stripe.com, can you check their TLS certificate issuer and expiry, DNS resolution, and security header grade so I can include it in our vendor risk report?”
Certificate expiry monitoring alert
“Check the TLS certificate details for api.mycompany.com — I need to know who issued it and when it expires so I can make sure we renew before it lapses.”
Security posture audit for competitor analysis
“Can you pull the HTTP security headers grade and DNS records for openai.com? I'm benchmarking how they handle security headers compared to our own domain.”
Technical details
Endpoint
GEThttps://defi-yield.agentdiet.dev/v1/asn-lookup?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, live snapshot of a domain's DNS resolution, TLS certificate metadata, and HTTP security posture in a single call. Prefer it over manual nslookup/curl workflows when an agent needs structured OSINT data about a domain for security due diligence, vendor risk assessment, certificate monitoring, or reconnaissance tasks.
Side effects
- Domain does not resolve — DNS lookup failure returned if the domain has no valid DNS records
- TLS certificate unreachable — if the domain does not serve HTTPS, certificate data may be absent
- Invalid domain input — error if the domain string is malformed or empty
- Timeout — live network probes may time out for slow or unresponsive domains
- Non-public domain — private or internal hostnames may return incomplete data
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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