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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 name.
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/ssl-audit)
Output
Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity), and an HTTP security header grade reflecting the presence or absence of headers like HSTS, CSP, and X-Frame-Options for the queried domain.
Example use cases
Pre-deployment security check
“Before we launch, can you audit the TLS cert and security headers on our domain acmecorp.io? I want to know who issued the cert, when it expires, and whether we're getting a good security grade.”
Vendor domain due diligence
“We're onboarding a new vendor — can you check the DNS resolution, SSL certificate details, and HTTP security posture for vendorportal.example.com so I can flag any risks?”
Certificate expiry monitoring alert
“Can you pull the TLS certificate info for api.myproduct.dev and tell me the expiry date? I want to know how many days we have left before it expires.”
Technical details
Endpoint
GEThttps://prompt-guard.agentdiet.dev/v1/ssl-audit?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, all-in-one OSINT snapshot of a domain's DNS posture, TLS certificate health, and HTTP security headers without deploying your own scanning infrastructure. It is particularly useful for security audits, vendor due diligence, pre-launch checklists, or certificate expiry monitoring. Prefer it over general port scanners or manual dig/curl workflows when you need structured, machine-readable output in a single API call.
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain is unreachable or times out during live probe
- TLS certificate is missing or self-signed — may return partial data
- Invalid domain string input — returns validation error
- Rate limiting or payment failure (HTTP 402) if USDC payment is not provided
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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