# 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 (issuer, expiry), and HTTP security header grading for a given domain.

## Facts

- Endpoint: GET https://polymarket-odds.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: 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-9c5e99d4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LqA4tWwB5jDFzccrhaFAS

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-9c5e99d4
```

Example prompt: Can you audit anthropic.com for me — I want to see its DNS resolution (both IPv4 and IPv6), TLS certificate issuer and expiry date, and HTTP security header grade?

## When to prefer this

Choose this endpoint when you need a quick, all-in-one snapshot of a domain's DNS resolution, TLS certificate health, and HTTP security posture without setting up your own scanning infrastructure. It is ideal for OSINT reconnaissance, vendor security checks, certificate expiry monitoring, and quick security audits of third-party domains. Prefer this over general web scrapers (which don't surface TLS or header data) and over dedicated SSL checker tools (which don't include DNS or header grading).

## Known failure modes

- Domain does not exist or fails DNS resolution — returns empty or error for DNS fields
- Domain is unreachable over HTTPS — TLS certificate fields will be absent or error
- Domain blocks automated HTTP requests — security headers may be incomplete
- Invalid domain input (e.g. missing TLD, malformed string) — likely returns validation error
- Domain resolves but has no IPv6 record — IPv6 field will be null or empty

## 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/ssl-audit)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer name, expiry date, validity status), and an HTTP security header grade/assessment (e.g. presence of HSTS, CSP, X-Frame-Options, and similar headers), all reflecting the current live state of 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-9c5e99d4/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)