# broker-ssl-audit: Domain OSINT, TLS Certificate & Security Headers Recon

> broker-ssl-audit: Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from x402broker.com, paid per call via x402 or MPP, $0.01/call, status unknown (last checked 2026-10-20).

Inspects a domain's live DNS resolution (IPv4/IPv6), TLS certificate details (issuer, expiry), and HTTP security headers grade for OSINT and security auditing.

## Facts

- Endpoint: GET https://x402broker.com/v1/ssl-audit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402, MPP
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/broker-ssl-audit-domain-osint-tls-certificate-security-headers-recon-8715a9e7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3FIr7xtebjYE9Ea1HSXuD

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 broker-ssl-audit-domain-osint-tls-certificate-security-headers-recon-8715a9e7
```

Example prompt: Can you do a full SSL and security headers audit on stripe.com — I want to see the TLS certificate issuer, expiry date, DNS resolution, and overall HTTP security grade?

## When to prefer this

Choose this endpoint when you need a quick, all-in-one OSINT snapshot of a domain's DNS resolution, TLS certificate health, and HTTP security headers without setting up your own scanning infrastructure. It is ideal for security audits, vendor due diligence, pre-deployment checks, or monitoring third-party domains for certificate expiry. Prefer it over generic whois tools when you specifically need live TLS and security header data in a single call.

## Known failure modes

- Domain does not exist or cannot be resolved — DNS lookup failure returned
- Domain is reachable but does not serve HTTPS — TLS certificate data unavailable
- Request missing required 'domain' query parameter — validation error
- Target server times out during connection — timeout error returned
- Invalid domain format provided — input validation 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://x402broker.com/v1/ssl-audit)

## Output

Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate details including issuer and expiry date, and an HTTP security headers grade reflecting the domain's security posture.

## 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/broker-ssl-audit-domain-osint-tls-certificate-security-headers-recon-8715a9e7/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)