# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from company-enrich.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 (issuer, expiry), and HTTP security header grading for a given domain.

## Facts

- Endpoint: GET https://company-enrich.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: company-enrich.agentdiet.dev
- Website: https://company-enrich.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/company-enrich-agentdiet-dev-domain-osint-tls-certificate-security-0bfcb3f8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uR6o4QN1YOfVpywVWIJXK

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 company-enrich-agentdiet-dev-domain-osint-tls-certificate-security-0bfcb3f8
```

Example prompt: Can you run a full DNS, TLS certificate, and HTTP security header recon on anthropic.com — I want to see the IPv4/IPv6 addresses, who issued the cert, when it expires, and what security grade the site gets?

## When to prefer this

Choose this endpoint when you need a live, real-time snapshot of a domain's DNS resolution, TLS certificate health, and HTTP security configuration in a single call. It is ideal for security due diligence, vendor assessments, pre-engagement OSINT, and certificate expiry monitoring. Prefer it over static WHOIS-only tools when you need TLS issuer/expiry details and HTTP security grading alongside DNS records.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error or empty DNS fields
- Domain has no TLS certificate (HTTP-only) — TLS fields may be null or absent
- Target host times out during live HTTP probe — security header results unavailable
- Malformed or missing domain parameter — API returns 400 bad request
- Network-level block prevents live TLS handshake — 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://company-enrich.agentdiet.dev/v1/whois-lookup)

## Output

Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate metadata (issuer, subject, expiry date), and an HTTP security header audit including a security grade, covering headers like HSTS, CSP, X-Frame-Options, and similar protective response headers.

## 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/company-enrich-agentdiet-dev-domain-osint-tls-certificate-security-0bfcb3f8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from company-enrich.agentdiet.dev](https://www.zero.xyz/host/company-enrich.agentdiet.dev/llms.txt)