# 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, TLS certificate inspection, and HTTP security header grading for a given domain name.

## Facts

- Endpoint: GET https://whale-momentum.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: 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-103b809f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qjIHYh5oZgxcqdElLfxUS

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-103b809f
```

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

## When to prefer this

Choose this endpoint when you need a quick, all-in-one passive OSINT snapshot of a domain's DNS, TLS, and HTTP security posture without deploying your own scanning infrastructure. It is especially useful for pre-integration vendor checks, threat triage, or competitive infrastructure monitoring where a single API call replaces running dig, openssl, and security header scanners separately.

## Known failure modes

- Domain does not resolve — returns DNS lookup failure or empty IP list
- Domain has no TLS certificate — returns missing or null certificate fields
- Domain unreachable over HTTP/S — security header grade unavailable
- Invalid domain input (empty string, malformed) — returns 400 validation error
- Rate limiting or payment failure — returns 402 Payment Required

## 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/asn-lookup)

## Output

Returns live DNS resolution results (IPv4 and/or IPv6 addresses), TLS certificate metadata including issuer and expiry date, and an HTTP security header grade reflecting the presence or absence of headers like HSTS, CSP, and X-Frame-Options.

## 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-103b809f/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)