# 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 (last checked 2026-10-23).

Performs live OSINT on a domain by inspecting its IPv4/IPv6 DNS resolution, TLS certificate issuer and expiry, and HTTP security header grade.

## Facts

- Endpoint: POST https://x402-audit.agentdiet.dev/v1/osint?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- 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-4e497483
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bG42QPX3UIt-spik25LJ6

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-4e497483 -d '<json body>'
```

Example prompt: Can you run a full domain recon on anthropic.com — I want to see its DNS resolution (IPv4 and IPv6), TLS certificate issuer and expiry date, and its HTTP security headers grade?

## When to prefer this

Choose this endpoint when you need a live, real-time OSINT snapshot combining DNS resolution, TLS certificate inspection, and HTTP security grading in a single call. It is ideal for security audits, vendor vetting, pre-deployment checks, or threat reconnaissance where you need authoritative live data rather than cached records. Prefer this over general-purpose DNS lookup tools when you also need TLS and HTTP security header analysis in one response.

## Known failure modes

- Domain does not exist or has no DNS records — returns empty or null DNS fields
- TLS certificate unreachable or connection refused — certificate fields may be null or error indicated
- Invalid domain string input — validation error returned
- Domain resolves but HTTP server is unreachable — security headers grade unavailable
- Timeout on live DNS/TLS probe for slow or geographically distant domains

## 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/osint)

## Output

Returns a structured object containing live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, subject, expiry date, validity status), and an HTTP security headers audit grade, giving a full OSINT snapshot of the target domain's network and security configuration.

## 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-4e497483/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)