# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from workflows.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 target domain.

## Facts

- Endpoint: GET https://workflows.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: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-domain-osint-tls-certificate-security-headers-ebbe0845
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zgDXrI8kCAuIyNm-CWXof

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 workflows-agentdiet-dev-domain-osint-tls-certificate-security-headers-ebbe0845
```

Example prompt: Can you run a full domain OSINT scan on openai.com — I want to see its DNS resolution (IPv4 and IPv6), TLS certificate issuer and expiry date, and how its HTTP security headers grade out?

## When to prefer this

Choose this endpoint when you need a quick, all-in-one passive reconnaissance snapshot of a domain's DNS, TLS, and HTTP security posture without setting up your own scanning infrastructure. Ideal for security audits, vendor due diligence, pre-deployment checks, or OSINT workflows where you want certificate expiry, issuer, DNS records, and security header grades in a single API call.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns DNS lookup error
- Domain is unreachable or blocks probes — TLS or header data may be incomplete
- Invalid or malformed domain string — validation error returned
- Domain has no TLS (HTTP only) — certificate fields may be empty or null
- Rate limiting or payment failure (HTTP 402) — request rejected until payment resolved

## 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://workflows.agentdiet.dev/v1/tls-scanner)

## Output

Returns a structured object containing live IPv4 and IPv6 DNS resolution results, TLS certificate metadata (issuer, subject, expiry date, validity status), and HTTP security header analysis including presence/absence of headers like HSTS, CSP, X-Frame-Options, and an overall security grade.

## 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/workflows-agentdiet-dev-domain-osint-tls-certificate-security-headers-ebbe0845/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)