# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from llms-generator.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Performs live reconnaissance on a domain, inspecting IPv4/IPv6 DNS resolution, TLS certificate issuer and expiry, and HTTP security header grading.

## Facts

- Endpoint: GET https://llms-generator.agentdiet.dev/v1/dns-whois-tls-recon?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: llms-generator.agentdiet.dev
- Website: https://llms-generator.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/llms-generator-agentdiet-dev-domain-osint-tls-certificate-security-773e63a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UmEjEAuLm4AY8LIHGL09r

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 llms-generator-agentdiet-dev-domain-osint-tls-certificate-security-773e63a8
```

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

## When to prefer this

Choose this endpoint when you need real-time, live OSINT data on a domain's DNS, TLS, and HTTP security posture in a single call — especially useful for security analysts, threat intelligence workflows, vendor due diligence, phishing investigation, or certificate expiry monitoring. Prefer this over static WHOIS-only tools when you need TLS issuer/expiry and security header grading alongside DNS resolution.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns empty or error response
- Domain is unreachable at time of query — TLS and header data unavailable
- Domain has no TLS certificate — cert fields returned as null or empty
- Invalid domain format provided — validation error returned
- Rate limiting or payment failure (HTTP 402) — request blocked

## 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://llms-generator.agentdiet.dev/v1/dns-whois-tls-recon)

## Output

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

## 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/llms-generator-agentdiet-dev-domain-osint-tls-certificate-security-773e63a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from llms-generator.agentdiet.dev](https://www.zero.xyz/host/llms-generator.agentdiet.dev/llms.txt)