# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from x402-audit.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown.

Performs live reconnaissance on a domain including IPv4/IPv6 DNS resolution, TLS certificate issuer and expiry details, and HTTP security header grading.

## Facts

- Endpoint: POST https://x402-audit.agentdiet.dev/v1/domain-osint?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Activations on Zero: 0
- Provider: x402-audit.agentdiet.dev
- Website: https://x402-audit.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/x402-audit-agentdiet-dev-domain-osint-tls-certificate-security-fb98b62f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fJ8-qfmWWKmcGQa6fEa6l

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 x402-audit-agentdiet-dev-domain-osint-tls-certificate-security-fb98b62f -d '<json body>'
```

Example prompt: Can you run a full security recon on anthropic.com — check its DNS resolution, TLS certificate issuer and expiry, and HTTP security headers grade?

## When to prefer this

Choose this endpoint when you need live, real-time DNS, TLS, and HTTP security header intelligence on a specific domain in a single call. It's ideal for security audits, pre-acquisition due diligence, certificate expiry checks, and infrastructure OSINT where you need all three signals together rather than querying separate tools.

## Known failure modes

- Domain does not resolve — returns DNS failure or empty record set
- Domain refuses TLS connection — certificate details unavailable
- HTTP security headers unretrievable if domain blocks HTTP requests
- Invalid or malformed domain input returns validation error
- Timeout if target domain is slow or unreachable

## 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://x402-audit.agentdiet.dev/v1/domain-osint)

## Output

Returns live-fetched data including resolved IPv4 and IPv6 addresses for the domain, TLS certificate details (issuer, validity dates, expiry), and an HTTP security header audit with a security grade indicating the presence or absence of headers like HSTS, CSP, X-Frame-Options, and others.

## 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/x402-audit-agentdiet-dev-domain-osint-tls-certificate-security-fb98b62f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-audit.agentdiet.dev](https://www.zero.xyz/host/x402-audit.agentdiet.dev/llms.txt)