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

## Facts

- Endpoint: GET https://x402broker.com/v1/osint?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-c2e64fba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T7t2WS4LVgRGl2tvK7AsF

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-c2e64fba
```

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

## When to prefer this

Choose this endpoint when you need a quick, combined OSINT snapshot of a domain's network and security posture — DNS resolution, TLS certificate details, and HTTP security headers in a single call. Prefer it over manual tooling or separate nslookup/openssl/curl checks when an agent needs to programmatically assess domain security, perform vendor due diligence, monitor certificate health, or conduct lightweight reconnaissance without requiring shell access.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain has no TLS certificate (HTTP-only) — TLS fields will be absent or indicate failure
- Domain is unreachable or times out — may return partial results or timeout error
- Invalid domain format provided — returns validation error
- Domain blocks automated HTTP requests — security headers may be incomplete

## 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/osint)

## Output

Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security header audit with a security grade, all gathered in real time for the specified 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-c2e64fba/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)