# 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).

Inspects a domain's live DNS resolution (IPv4/IPv6), TLS certificate details (issuer, expiry), and HTTP security header grade for reconnaissance and security auditing.

## Facts

- Endpoint: GET https://sec-intel.agentdiet.dev/v1/tls-scanner?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-c8afef91
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MjIGIzPkV8t8ohfzWm_wT

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-c8afef91
```

Example prompt: Can you scan anthropic.com and tell me its DNS IP addresses, who issued its TLS certificate, when it expires, and what its HTTP security header grade is?

## When to prefer this

Choose this endpoint when you need a single API call to gather combined DNS, TLS certificate, and HTTP security header intelligence on a domain — ideal for security audits, vendor risk assessments, domain OSINT reconnaissance, or certificate expiry monitoring. Prefer it over generic WHOIS or port-scanning tools when TLS and security header grading are specifically required alongside DNS data.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns an error or empty DNS fields
- TLS handshake failure if the host has no HTTPS or an invalid certificate
- Timeout if the target host is unreachable or firewalled
- Invalid domain input (empty string or malformed hostname) returns a validation error
- HTTP security header scan may be incomplete if the server does not respond to HTTP requests

## 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/tls-scanner)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, validity period, expiry date), and an HTTP security header assessment or grade for the scanned 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-c8afef91/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)