# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from email-verify.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 any domain.

## Facts

- Endpoint: GET https://email-verify.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: email-verify.agentdiet.dev
- Website: https://email-verify.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/email-verify-agentdiet-dev-domain-osint-tls-certificate-security-01c7bc16
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_c7wsIIKAUWP7Ve0EQW8U4

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 email-verify-agentdiet-dev-domain-osint-tls-certificate-security-01c7bc16
```

Example prompt: Can you scan anthropic.com and tell me its TLS certificate issuer, expiry date, DNS resolution, and HTTP security header grade?

## When to prefer this

Choose this endpoint when you need a quick, all-in-one OSINT snapshot of a domain's DNS, TLS certificate, and HTTP security posture without standing up your own scanning infrastructure. It is especially useful for security audits, pre-launch checks, vendor due diligence, or competitive reconnaissance where you need live data rather than cached registry information.

## Known failure modes

- Domain does not exist or cannot be resolved — DNS lookup fails with an error
- Domain is unreachable or times out — TLS/HTTP scan returns a timeout error
- Invalid domain format provided — API returns a validation error
- Domain resolves but has no HTTPS endpoint — TLS certificate data may be absent
- Rate limiting or payment failure — 402 payment required error

## 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://email-verify.agentdiet.dev/v1/tls-scanner)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate details including issuer and expiry date, and an HTTP security header grade reflecting the presence and quality of headers like HSTS, CSP, X-Frame-Options, and others.

## 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/email-verify-agentdiet-dev-domain-osint-tls-certificate-security-01c7bc16/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email-verify.agentdiet.dev](https://www.zero.xyz/host/email-verify.agentdiet.dev/llms.txt)