# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from whale-momentum.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://whale-momentum.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: whale-momentum.agentdiet.dev
- Website: https://whale-momentum.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/whale-momentum-agentdiet-dev-domain-osint-tls-certificate-security-d5d0b6b6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZLsaRdo1y7glsR0vKMjO3

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 whale-momentum-agentdiet-dev-domain-osint-tls-certificate-security-d5d0b6b6
```

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

## When to prefer this

Choose this endpoint when you need a quick, all-in-one passive OSINT snapshot of a domain's DNS resolution, SSL/TLS certificate health, and HTTP security header posture without running active exploits or vulnerability scans. It is ideal for pre-acquisition due diligence, vendor risk assessments, competitive benchmarking, or certificate expiry monitoring where a single low-cost call ($0.01) returns all three signals together.

## Known failure modes

- Domain does not exist or fails DNS resolution — empty or error response
- TLS certificate not present (HTTP-only domain) — certificate fields may be null or missing
- Domain blocks automated HTTP requests — security headers may be unavailable
- Invalid domain format supplied — validation error returned
- Upstream DNS or TLS inspection timeout — service may return partial results or error

## 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://whale-momentum.agentdiet.dev/v1/subdomain-scan)

## Output

Returns a structured JSON object containing live IPv4 and IPv6 DNS resolution results, TLS certificate details (issuer, validity period, expiry date), and an HTTP security headers 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/whale-momentum-agentdiet-dev-domain-osint-tls-certificate-security-d5d0b6b6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whale-momentum.agentdiet.dev](https://www.zero.xyz/host/whale-momentum.agentdiet.dev/llms.txt)