# 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 target domain.

## Facts

- Endpoint: GET https://mcp-compiler.agentdiet.dev/v1/asn-lookup?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-1a25de66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_U1ofL1CwNyJ6vyJR4a97H

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-1a25de66
```

Example prompt: Can you run a full security recon on anthropic.com — check the DNS records (IPv4 and IPv6), who issued the TLS certificate and when it expires, and what HTTP security grade the site gets?

## When to prefer this

Choose this endpoint when you need a combined, single-call OSINT snapshot of a domain's DNS, TLS, and HTTP security posture without stitching together separate DNS, SSL checker, and header scanner tools. Ideal for security due diligence, vendor risk assessment, certificate expiry monitoring, or threat intelligence on suspicious domains.

## Known failure modes

- Domain does not exist or cannot be resolved — DNS lookup fails
- Domain has no TLS certificate (HTTP-only) — certificate fields absent or null
- Network timeout reaching the target domain — partial or empty response
- Malformed domain input — validation error returned
- Domain exists but blocks automated probes — incomplete header 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/asn-lookup)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, validity dates/expiry), and an HTTP security header grade assessing the domain's security posture.

## 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-1a25de66/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)