# 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 (IPv4/IPv6), TLS certificate inspection, and HTTP security header grading for a given domain.

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/whois-lookup?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-domain-osint-tls-certificate-security-headers-3a16575d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gLNwXRSVLHIBuKeOmu91q

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability workflows-agentdiet-dev-domain-osint-tls-certificate-security-headers-3a16575d
```

Example prompt: Can you run a full domain OSINT check on stripe.com — I need the live DNS IPs, TLS certificate issuer and expiry date, and the HTTP security header grade?

## When to prefer this

Choose this endpoint when you need a fast, single-call recon of a domain's live network posture — DNS IPs, TLS cert health, and HTTP security grade — without standing up your own scanning infrastructure. Ideal for security due diligence, vendor assessments, phishing investigations, or pre-launch audits where you need actionable OSINT in one shot rather than piecing together multiple tools.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns empty or error DNS fields
- Domain has no HTTPS/TLS — TLS certificate fields may be null or unavailable
- HTTP request to domain times out — security headers grade may be unavailable
- Invalid domain string passed — validation error returned
- Domain resolves but blocks external probes — partial results returned

## 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/whois-lookup)

## Output

Returns a structured object containing live IPv4 and IPv6 DNS resolution results, TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security header grade reflecting the presence or absence of headers like HSTS, CSP, X-Frame-Options, and similar.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "domain": {
   "type": "string",
   "minLength": 1,
   "description": "Target domain name (e.g. anthropic.com, openai.com) for DNS, TLS certificate, and security header OSINT"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/workflows-agentdiet-dev-domain-osint-tls-certificate-security-headers-3a16575d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)