# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from polymarket-odds.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 analysis for a given domain.

## Facts

- Endpoint: GET https://polymarket-odds.agentdiet.dev/v1/dns-whois-tls-recon?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: polymarket-odds.agentdiet.dev
- Website: https://polymarket-odds.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/polymarket-odds-agentdiet-dev-domain-osint-tls-certificate-security-7f569be8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JLbq81J1sQ69lSxl1Ws2-

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 polymarket-odds-agentdiet-dev-domain-osint-tls-certificate-security-7f569be8
```

Example prompt: Can you run a full DNS, TLS certificate, and security headers recon on stripe.com — I want to see what IPs it resolves to, who issued the cert and when it expires, and how its HTTP security grade looks?

## When to prefer this

Use this endpoint when you need a combined DNS + TLS + security headers snapshot of a domain in a single call, especially for security due diligence, OSINT investigations, certificate expiry monitoring, or infrastructure audits. Prefer this over manual lookups or separate tools when you need all three data layers at once without stitching together multiple APIs.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain is unreachable or times out during TLS handshake — certificate data may be missing
- Domain serves no HTTPS — TLS certificate inspection returns null or error
- Invalid or empty domain input — returns validation error
- Domain blocks automated probes or rate-limits — may return incomplete results

## 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://polymarket-odds.agentdiet.dev/v1/dns-whois-tls-recon)

## Output

Returns live DNS resolution data (IPv4 and IPv6 addresses), TLS certificate details (issuer, expiry date, validity), and an HTTP security grade based on the domain's security headers — all gathered in real time from the target 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/polymarket-odds-agentdiet-dev-domain-osint-tls-certificate-security-7f569be8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polymarket-odds.agentdiet.dev](https://www.zero.xyz/host/polymarket-odds.agentdiet.dev/llms.txt)