# 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/dns-recon?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-c2c37e96
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Rz8csP6woVg14VVQfPaU3

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-c2c37e96
```

Example prompt: Can you run a full DNS and TLS recon on anthropic.com — I want to see its IPv4/IPv6 addresses, who issued its SSL certificate and when it expires, and what HTTP security headers it has?

## When to prefer this

Choose this endpoint when you need a combined, single-call view of a domain's DNS resolution, TLS certificate health, and HTTP security posture — ideal for OSINT workflows, vendor due diligence, pre-launch security audits, or competitive reconnaissance. Prefer it over raw dig/whois tools when you want structured, agent-consumable output without assembling multiple tools.

## Known failure modes

- Domain does not exist or fails to resolve — DNS lookup returns no records
- Domain is reachable but has no HTTPS/TLS — certificate fields may be null or absent
- Connection timeout if the target host is slow or firewalled
- Invalid domain input (e.g. bare IP, malformed hostname) returns validation error
- Payment failure via x402 if USDC balance is insufficient

## 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/dns-recon)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security header assessment 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-c2c37e96/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)