# 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 target domain.

## Facts

- Endpoint: GET https://x402broker.com/v1/cert-transparency?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-7e4fc361
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_grxPJom-vYHvJH4XVcAM3

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-7e4fc361
```

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

## When to prefer this

Choose this endpoint when you need a combined, live view of a domain's DNS records, TLS certificate metadata, and HTTP security headers in a single call — particularly for security audits, OSINT investigations, pre-acquisition due diligence, or certificate expiry monitoring. It is preferable over generic whois or passive certificate-transparency log searches when you need live, real-time data across all three dimensions simultaneously.

## Known failure modes

- Domain does not exist or fails DNS resolution — may return empty or error response
- Domain has no TLS certificate (plain HTTP only) — TLS fields may be null or absent
- Connection timeout if the target domain is unreachable or behind a firewall
- Invalid domain format provided — API may return a validation error
- Rate limiting or payment failure due to x402 protocol issues

## 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/cert-transparency)

## Output

Returns live IPv4 and IPv6 DNS resolution results, TLS certificate details (issuer, validity period, expiry date), and an HTTP security headers 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/x402broker-com-domain-osint-tls-certificate-security-headers-recon-7e4fc361/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)