# 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 given domain.

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/domain-osint?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-4387c6a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Yuc_ss2tbKcDrLeFwn9mO

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-4387c6a6
```

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

## When to prefer this

Use this endpoint when you need a fast, single-call recon of a domain's DNS resolution, TLS certificate health, and HTTP security posture — especially useful for vendor due diligence, pre-launch audits, OSINT investigations, or monitoring certificate expiry. Prefer this over manual nslookup/curl workflows or separate security scanning tools when you need consolidated results in one agent-friendly response.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns empty or error result
- Domain has no HTTPS/TLS — certificate fields may be null or absent
- Firewall or rate-limiting on target domain may cause incomplete data
- Invalid or malformed domain input returns a validation error
- Timeout if target domain is very slow to respond

## 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/domain-osint)

## Output

Returns live IPv4 and IPv6 DNS resolution results, TLS certificate details (issuer, expiry date, validity status), and an HTTP security header grade indicating the presence and correctness of headers like HSTS, CSP, X-Frame-Options, and similar security controls.

## 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-4387c6a6/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)