# 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 2026-10-21).

Performs live DNS resolution (IPv4/IPv6), TLS certificate inspection, and HTTP security header grading for a given domain.

## Facts

- Endpoint: GET https://x402-audit.agentdiet.dev/v1/asn-lookup?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-c5c2b2ba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AXJYvg1TTXIGAX0XPOS0G

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-c5c2b2ba
```

Example prompt: Can you run a full domain OSINT check on stripe.com — I need its IPv4/IPv6 DNS resolution, TLS certificate issuer and expiry date, and HTTP security header grade?

## When to prefer this

Choose this endpoint when you need a fast, combined OSINT snapshot covering DNS, TLS certificate health, and HTTP security posture for a domain in a single call — especially useful for vendor due diligence, certificate expiry monitoring, or security audits where you don't want to stitch together multiple tools.

## Known failure modes

- Domain does not resolve — DNS lookup failure returned
- Domain has no HTTPS/TLS endpoint — certificate data unavailable
- Invalid or malformed domain string provided — validation error
- Target server is unreachable or times out — connection failure
- HTTP security headers absent — partial results returned with missing grade

## 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/asn-lookup)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity), and an HTTP security header grade/analysis for the target domain — giving a snapshot of the domain's infrastructure and 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/x402-audit-agentdiet-dev-domain-osint-tls-certificate-security-c5c2b2ba/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)