# 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/tls-scanner?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-d6784180
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4Wt93Yx_oCDK-4t0iiyv2

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-d6784180
```

Example prompt: Can you scan anthropic.com and tell me who issued its TLS certificate, when it expires, what IPs it resolves to, and how it scores on HTTP security headers?

## When to prefer this

Use this endpoint when you need a quick, combined OSINT snapshot of a domain's DNS, TLS, and HTTP security posture in a single call, rather than stitching together separate DNS lookup, SSL checker, and security header grader tools. Particularly useful for security due diligence, vendor risk assessments, or reconnaissance workflows where you want certificate issuer/expiry, IPv4/IPv6 resolution, and security header grades in one response.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error indicating unresolvable domain
- Domain is unreachable or times out during TLS handshake — returns connection error
- Domain has no TLS certificate (HTTP-only) — certificate fields may be null or absent
- Malformed domain input — returns validation error for invalid domain string
- Rate limiting or payment failure — HTTP 402 returned if payment not provided

## 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/tls-scanner)

## Output

Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate details (issuer, expiry date, validity status), and an HTTP security header audit including grade or score, for the queried 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-d6784180/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)