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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 agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-28).
Performs live OSINT on a domain by resolving its IPv4/IPv6 DNS records, inspecting TLS certificate issuer and expiry, and grading its HTTP security headers.
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://agentdiet.dev/v1/osint)
Output
Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate details (issuer, expiry date, validity status), and an HTTP security headers grade reflecting the domain's security posture.
Example use cases
Pre-acquisition security due diligence
“We're evaluating acquiring a startup — can you pull the full OSINT breakdown on theirdomain.io? I need their DNS records, TLS certificate issuer and expiry date, and their HTTP security header grade before we proceed.”
Monitoring vendor certificate expiry
“Can you check the TLS certificate expiry date and issuer for our payment processor's domain, paymentco.com? I want to make sure it's not going to expire on us in the next 30 days.”
Competitor security posture audit
“I want to see how our competitor's web security stacks up — can you run an OSINT recon on competitor.com and tell me their DNS resolution, TLS cert details, and how their security headers grade?”
Technical details
Endpoint
POSThttps://agentdiet.dev/v1/osint?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, single-call OSINT snapshot of a domain's DNS, TLS, and security header posture without setting up your own scanning infrastructure. Ideal for due diligence workflows, pre-launch security checks, vendor risk assessments, and monitoring certificate expiry. Prefer this over general web scrapers or manual nslookup/curl workflows when you need structured, machine-readable security intelligence on a live domain.
Side effects
- Domain does not exist or fails DNS resolution — returns resolution failure or empty record set
- Domain has no TLS certificate or uses HTTP only — TLS fields absent or error indicated
- Domain blocks automated probes or returns no security headers — partial or empty header grade
- Invalid domain format provided — returns validation error
- Network timeout reaching the target domain — returns timeout error
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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