# 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, TLS certificate inspection, and HTTP security header grading for a given domain

## Facts

- Endpoint: GET https://email-verify.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: 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-d72ded57
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XMSm9ZemhLnmiC8jZZKFF

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-d72ded57
```

Example prompt: Can you check the DNS resolution, TLS certificate issuer and expiry, and HTTP security grade for stripe.com?

## When to prefer this

Choose this endpoint when you need a quick, combined DNS + TLS + HTTP security header snapshot for a domain in a single call, especially for OSINT workflows, vendor due diligence, certificate expiry monitoring, or pre-integration security checks. Prefer this over separate DNS lookup tools when you also need TLS certificate issuer/expiry and security header grading in one response.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error or empty DNS fields
- Domain is unreachable or times out during TLS handshake — TLS fields may be null or error
- Domain uses HTTP only with no TLS — certificate fields will be absent
- Invalid or malformed domain input — returns validation error
- Firewall or geo-block prevents live probing — partial or failed 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://email-verify.agentdiet.dev/v1/dns-recon)

## Output

Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate details including issuer and expiry date, and an HTTP security header grade 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/email-verify-agentdiet-dev-domain-osint-tls-certificate-security-d72ded57/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)