# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from mcp-compiler.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://mcp-compiler.agentdiet.dev/v1/tls-scanner?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: mcp-compiler.agentdiet.dev
- Website: https://mcp-compiler.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-compiler-agentdiet-dev-domain-osint-tls-certificate-security-131bc07f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pgi1Sgvef9mMoRuKVF1hi

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-compiler-agentdiet-dev-domain-osint-tls-certificate-security-131bc07f
```

Example prompt: Can you scan anthropic.com and tell me who issued its TLS certificate, when it expires, what DNS IPs it resolves to, and how its HTTP security headers grade?

## When to prefer this

Choose this endpoint when you need a single-call, combined view of DNS resolution, TLS certificate health, and HTTP security posture for a domain — ideal for OSINT pipelines, vendor due diligence, pre-launch audits, or monitoring competitor infrastructure. Prefer this over separate DNS, certificate, or header scanning tools when you want all three dimensions in one request at low cost.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain has no HTTPS / TLS configured — TLS fields will be absent or show an error
- Network timeout when connecting to the target domain — may return partial results
- Invalid domain string provided (e.g. missing TLD, spaces) — validation error
- Domain is behind a firewall or blocks probes — may return incomplete or refused connection data

## 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-compiler.agentdiet.dev/v1/tls-scanner)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, subject, expiry date, validity status), and an HTTP security header audit with a grade or score — all 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-compiler-agentdiet-dev-domain-osint-tls-certificate-security-131bc07f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-compiler.agentdiet.dev](https://www.zero.xyz/host/mcp-compiler.agentdiet.dev/llms.txt)