# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from domain-osint.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Performs live reconnaissance on a domain by resolving IPv4/IPv6 DNS, inspecting TLS certificate issuer and expiry, and grading HTTP security headers.

## Facts

- Endpoint: GET https://domain-osint.agentdiet.dev/v1/ssl-audit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: domain-osint.agentdiet.dev
- Website: https://domain-osint.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/domain-osint-agentdiet-dev-domain-osint-tls-certificate-security-fe5a94bd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_leWyhpuzML4MBsHZsqNyE

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 domain-osint-agentdiet-dev-domain-osint-tls-certificate-security-fe5a94bd
```

Example prompt: Can you run a full DNS, TLS certificate, and security headers audit on stripe.com — I want to know the IPv4/IPv6 resolution, who issued their SSL cert, when it expires, and how their HTTP security headers grade out?

## When to prefer this

Choose this endpoint when you need a combined, single-call OSINT snapshot covering DNS resolution, TLS certificate metadata, and HTTP security headers for any domain — especially useful for vendor due diligence, continuous security monitoring, competitive benchmarking, or pre-integration security checks where all three data points are needed together rather than calling separate specialized tools.

## Known failure modes

- Domain does not exist or fails to resolve — DNS lookup returns empty or NXDOMAIN
- Domain has no TLS certificate (HTTP-only) — certificate fields may be null or absent
- Security headers not present — grading reflects missing headers
- Network timeout reaching the target domain — connection error returned
- Invalid domain format supplied — validation error on the domain parameter
- Payment not completed — HTTP 402 returned if x402 micropayment not sent

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

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, validity period, expiry date), and an HTTP security headers grade or breakdown — giving a full picture of a 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/domain-osint-agentdiet-dev-domain-osint-tls-certificate-security-fe5a94bd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from domain-osint.agentdiet.dev](https://www.zero.xyz/host/domain-osint.agentdiet.dev/llms.txt)