# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from x402broker.com, 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://x402broker.com/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: x402broker.com
- Website: https://x402broker.com
- Canonical page: https://www.zero.xyz/c/x402broker-com-domain-osint-tls-certificate-security-headers-recon-2bec32b3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_x9xwtHpwHU5Hk2amSLsrD

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 x402broker-com-domain-osint-tls-certificate-security-headers-recon-2bec32b3
```

Example prompt: Can you run a full domain OSINT check on stripe.com — I want to see its DNS records (IPv4 and IPv6), who issued the TLS certificate and when it expires, and what its HTTP security header grade looks like?

## When to prefer this

Choose this endpoint when you need a fast, combined OSINT snapshot of a domain's DNS posture, TLS certificate health, and HTTP security configuration in a single call. It is ideal for security audits, vendor due diligence, certificate expiry checks, or threat intelligence triage where you need infrastructure-level signals about a domain without setting up your own scanning toolchain.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns empty or error response
- Domain is unreachable over HTTPS — TLS data unavailable
- Domain actively blocks probes — incomplete security header data returned
- Invalid domain string provided — input validation error
- Network timeout reaching the target domain — partial or no 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://x402broker.com/v1/asn-lookup)

## Output

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

## 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/x402broker-com-domain-osint-tls-certificate-security-headers-recon-2bec32b3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402broker.com](https://www.zero.xyz/host/x402broker.com/llms.txt)