# Domain OSINT, TLS Certificate & Security Headers Recon

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

## Facts

- Endpoint: GET https://mesh.agentdiet.dev/v1/subdomain-scan?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mesh.agentdiet.dev
- Website: https://mesh.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mesh-agentdiet-dev-domain-osint-tls-certificate-security-headers-recon-be8727c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jhjtEXO9KhZHdGJzDrfqo

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 mesh-agentdiet-dev-domain-osint-tls-certificate-security-headers-recon-be8727c4
```

Example prompt: Can you run a full DNS, TLS certificate, and HTTP security header recon on stripe.com — I want to know their IPv4/IPv6 addresses, who issued their SSL cert and when it expires, and their security grade?

## When to prefer this

Choose this endpoint when you need a combined DNS/TLS/security-header snapshot of a domain in a single call, especially for OSINT workflows, vendor due diligence, certificate expiry checks, or security posture reviews. It is distinct from pure WHOIS/registrar lookups or full port-scanning tools — it focuses specifically on live IPv4/IPv6 resolution, certificate chain metadata, and HTTP security grading.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain has no HTTPS/TLS — TLS certificate fields absent or error
- Target domain times out on HTTP request — security headers grade unavailable
- Invalid domain string input — returns validation error
- Domain is reachable but blocks security header inspection — partial results returned

## 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://mesh.agentdiet.dev/v1/subdomain-scan)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security header grade/assessment for the queried 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/mesh-agentdiet-dev-domain-osint-tls-certificate-security-headers-recon-be8727c4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mesh.agentdiet.dev](https://www.zero.xyz/host/mesh.agentdiet.dev/llms.txt)