# Domain OSINT, TLS Certificate & Security Headers Recon

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

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

## Facts

- Endpoint: GET https://sec-intel.agentdiet.dev/v1/osint?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: sec-intel.agentdiet.dev
- Website: https://sec-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/sec-intel-agentdiet-dev-domain-osint-tls-certificate-security-headers-fe8d3f6c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R1XpqSpS1zIK-CQH-swe1

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 sec-intel-agentdiet-dev-domain-osint-tls-certificate-security-headers-fe8d3f6c
```

Example prompt: Can you run a full OSINT recon on openai.com — I want to see its DNS resolution (IPv4 and IPv6), who issued its TLS certificate and when it expires, and what its HTTP security header grade looks like?

## When to prefer this

Choose this endpoint when you need a quick, all-in-one domain reconnaissance snapshot covering DNS resolution, TLS certificate health, and HTTP security posture in a single call. It is ideal for pre-deployment security checks, vendor due diligence, threat intelligence workflows, or competitive infrastructure analysis — especially when you need live data rather than cached records.

## Known failure modes

- Domain does not resolve — returns empty or null DNS records
- Domain has no HTTPS/TLS — certificate fields may be absent or error
- Invalid or malformed domain string — API may return validation error
- Unreachable domain (firewall, blackhole) — timeout or connection error
- HTTP security headers unavailable if domain returns non-200 or blocks scanners

## 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://sec-intel.agentdiet.dev/v1/osint)

## 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 audit grade 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/sec-intel-agentdiet-dev-domain-osint-tls-certificate-security-headers-fe8d3f6c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sec-intel.agentdiet.dev](https://www.zero.xyz/host/sec-intel.agentdiet.dev/llms.txt)