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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 workflows.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 any 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://workflows.agentdiet.dev/v1/subdomain-scan)
Output
Returns live DNS resolution data including IPv4 and IPv6 addresses, TLS certificate metadata (issuer, validity dates, expiry), and an HTTP security grade based on the presence and quality of security response headers such as HSTS, CSP, and X-Frame-Options.
Example use cases
SSL expiry check before deployment
“Check the TLS certificate on api.mycompany.com — who issued it, and when does it expire? I want to make sure we're not about to hit an outage.”
Security header audit for compliance
“Audit the HTTP security headers on checkout.mystore.com and tell me what security grade it gets — I need to know if we're missing HSTS, CSP, or X-Frame-Options before our PCI review.”
Domain OSINT for vendor due diligence
“Run an OSINT check on openai.com — I need the DNS resolution, TLS certificate issuer, and overall HTTP security posture for a vendor risk assessment.”
Technical details
Endpoint
GEThttps://workflows.agentdiet.dev/v1/subdomain-scan?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, live OSINT snapshot of a domain's DNS, TLS, and HTTP security posture without deploying your own scanning infrastructure. Ideal for vendor due diligence, pre-deployment security checks, compliance audits, or threat intelligence workflows where a single domain lookup covering multiple security dimensions is needed at low cost ($0.01/call).
Side effects
- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain is unreachable or times out during TLS handshake — certificate data may be absent
- Domain serves only HTTP (no TLS) — certificate fields will be empty or null
- Invalid or malformed domain string input — returns validation error
- Domain blocks automated HTTP probes — security header grading may be incomplete or unavailable
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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