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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 prompt-guard.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).
Performs live DNS resolution, TLS certificate inspection, 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://prompt-guard.agentdiet.dev/v1/tls-scanner)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security headers grade reflecting the domain's security posture
Example use cases
Pre-acquisition domain security audit
“We're considering acquiring example.com — can you pull its DNS records, TLS certificate issuer and expiry date, and HTTP security header grade so we can assess its security posture before we proceed?”
Monitoring competitor SSL expiry
“Check the TLS certificate on openai.com — I want to know who issued it, when it expires, and whether their HTTP security headers are up to scratch.”
Incident response domain recon
“There's suspicious traffic coming from maliciousdomain.xyz — can you do a quick OSINT scan on it: DNS resolution, IPv4/IPv6 addresses, TLS cert details, and security header grade?”
Technical details
Endpoint
GEThttps://prompt-guard.agentdiet.dev/v1/tls-scanner?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a live, combined snapshot of a domain's DNS configuration, TLS certificate health, and HTTP security posture in a single call — ideal for OSINT recon, pre-due-diligence checks, or security audits where you need certificate issuer, expiry, and header grading without running separate tools
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain has no TLS certificate — TLS fields will be absent or null
- Domain is unreachable or times out during live probe — returns timeout error
- Invalid or malformed domain input — returns validation error
- HTTP security headers unavailable if domain blocks non-browser requests
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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