# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from mcp-security.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, and HTTP security header grading for a given domain.

## Facts

- Endpoint: GET https://mcp-security.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: mcp-security.agentdiet.dev
- Website: https://mcp-security.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-security-agentdiet-dev-domain-osint-tls-certificate-security-81cfa96a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bw6riO6BPNA0Ndm_5pW-F

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 mcp-security-agentdiet-dev-domain-osint-tls-certificate-security-81cfa96a
```

Example prompt: Can you check the DNS resolution, TLS certificate issuer and expiry, and HTTP security headers grade for stripe.com?

## When to prefer this

Use this endpoint when you need live, real-time DNS resolution combined with TLS certificate inspection and HTTP security header grading in a single call. Prefer it over manual dig/whois lookups or separate TLS scanners when an agent needs consolidated domain security intelligence for OSINT, due diligence, vendor assessment, or security audits.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain unreachable over HTTPS — TLS certificate data unavailable
- Non-existent or expired domain — may return partial data
- Rate limiting or payment failure (HTTP 402) — request blocked
- Timeout on live network probe — partial or no 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://mcp-security.agentdiet.dev/v1/dns-recon)

## Output

Returns live IPv4 and IPv6 DNS resolution results, TLS certificate metadata (issuer, expiry date, validity), and an HTTP security header grade reflecting presence or absence of headers like HSTS, CSP, X-Frame-Options, and similar security controls 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/mcp-security-agentdiet-dev-domain-osint-tls-certificate-security-81cfa96a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-security.agentdiet.dev](https://www.zero.xyz/host/mcp-security.agentdiet.dev/llms.txt)