# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from domain-osint.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://domain-osint.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: domain-osint.agentdiet.dev
- Website: https://domain-osint.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/domain-osint-agentdiet-dev-domain-osint-tls-certificate-security-8aaca668
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qKB5MEj733qbIFx-3FseL

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 domain-osint-agentdiet-dev-domain-osint-tls-certificate-security-8aaca668
```

Example prompt: Can you run a full DNS, TLS certificate, and security headers check on stripe.com — I want to know the IP addresses it resolves to, who issued its SSL cert and when it expires, and how it grades on HTTP security headers?

## When to prefer this

Use this endpoint when you need a quick, unified view of a domain's DNS resolution, TLS certificate health, and HTTP security posture in a single call. It is ideal for OSINT investigations, security audits, vendor due diligence, and phishing triage where you need live certificate and header data rather than historical WHOIS records.

## Known failure modes

- Domain does not exist or fails DNS resolution — no IP data returned
- Domain has no TLS certificate (HTTP-only) — certificate fields absent
- Domain times out during live probing — timeout or connectivity error
- Invalid domain format input — validation error returned
- Domain blocks probing requests — partial or empty results

## 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://domain-osint.agentdiet.dev/v1/asn-lookup)

## Output

Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate details (issuer, expiry date, validity status), and an HTTP security header audit including a security grade, 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/domain-osint-agentdiet-dev-domain-osint-tls-certificate-security-8aaca668/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from domain-osint.agentdiet.dev](https://www.zero.xyz/host/domain-osint.agentdiet.dev/llms.txt)