# 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 2026-10-21).

Performs live DNS resolution (IPv4/IPv6), TLS certificate inspection (issuer/expiry), and HTTP security header grading for any domain.

## Facts

- Endpoint: GET https://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: agentdiet.dev
- Website: https://agentdiet.dev
- Canonical page: https://www.zero.xyz/c/agentdiet-dev-domain-osint-tls-certificate-security-headers-recon-96960cea
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gaeM18pPW2x8o71389dWc

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 agentdiet-dev-domain-osint-tls-certificate-security-headers-recon-96960cea
```

Example prompt: Can you run a full domain OSINT recon on openai.com — I want to see its IPv4/IPv6 DNS records, TLS certificate issuer and expiry date, and how it scores on HTTP security headers?

## When to prefer this

Use this endpoint when you need a quick, unified OSINT snapshot of a domain's network and security posture — combining DNS, TLS, and HTTP header data in a single call — rather than querying separate tools for each. Ideal for security audits, vendor due diligence, certificate expiry monitoring, or domain reconnaissance workflows.

## Known failure modes

- Domain does not exist or fails to resolve — returns DNS lookup failure
- Domain is unreachable over HTTPS — TLS certificate data unavailable
- Domain blocks HTTP HEAD/GET probes — security headers cannot be graded
- Invalid or malformed domain name input — request validation error
- Timeout if target domain responds very slowly

## 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/dns-whois-tls-recon)

## Output

Returns live DNS resolution data (IPv4/IPv6 addresses), TLS certificate details (issuer, expiry date, validity), and an HTTP security header audit with a security grade — all fetched in real time for the target domain.

## 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/agentdiet-dev-domain-osint-tls-certificate-security-headers-recon-96960cea/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentdiet.dev](https://www.zero.xyz/host/agentdiet.dev/llms.txt)