# 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 grading for a given domain.

## Facts

- Endpoint: GET https://polymarket-odds.agentdiet.dev/v1/dns-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-95d7d75c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oOfgRpag0b_uEGinZhNR3

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-95d7d75c
```

Example prompt: Can you run a full DNS and TLS recon on anthropic.com — I want to see the IPv4/IPv6 addresses, who issued the certificate and when it expires, and how the HTTP security headers score?

## When to prefer this

Choose this endpoint when you need a combined DNS, TLS certificate, and HTTP security header snapshot for a single domain in one call, particularly for security audits, OSINT investigations, vendor risk assessments, or certificate expiry monitoring. Prefer it over manual dig/openssl workflows when you need structured, machine-readable output with security grading in real time.

## Known failure modes

- Domain does not exist or fails to resolve — DNS lookup returns no records
- Domain has no TLS certificate — certificate fields may be null or absent
- Domain is unreachable at inspection time — timeout or connection refused error
- Invalid domain format provided — validation error returned
- Domain uses non-standard ports or redirect chains — may affect header inspection accuracy

## 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-recon)

## Output

Returns live DNS resolution data (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, validity dates, expiry), and an HTTP security header grade assessing the domain's 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/polymarket-odds-agentdiet-dev-domain-osint-tls-certificate-security-95d7d75c/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)