# 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 reconnaissance on a domain including IPv4/IPv6 DNS resolution, TLS certificate issuer and expiry details, and HTTP security headers grading.

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/ssl-audit?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-9a3e3b9f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_N7wD2viGhQSXPLpjm5nLW

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-9a3e3b9f
```

Example prompt: Can you run a full domain recon on stripe.com — I want to see its DNS resolution (IPv4 and IPv6), TLS certificate issuer and expiry, and how its HTTP security headers are graded?

## When to prefer this

Choose this endpoint when you need a single, unified view of a domain's DNS posture, TLS certificate health, and HTTP security header compliance without setting up separate DNS, WHOIS, or SSL tooling. It is especially useful for security due diligence, vendor assessments, certificate expiry monitoring, or competitive OSINT workflows where a real-time live probe is required.

## Known failure modes

- Domain does not exist or has no DNS records — returns empty or error response
- Domain blocks external HTTP probes, preventing security header retrieval
- TLS handshake failure if domain has an expired or invalid certificate before scan
- Invalid domain string input (e.g. containing spaces or unsupported characters) — validation error
- Rate limiting or payment failure due to x402 micropayment not being processed

## 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/ssl-audit)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate details including issuer, subject, and expiry date, and an HTTP security headers analysis with a security grade — all fetched in real-time from 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/workflows-agentdiet-dev-domain-osint-tls-certificate-security-headers-9a3e3b9f/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)