# 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 target domain.

## Facts

- Endpoint: GET https://email-verify.agentdiet.dev/v1/asn-lookup?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-b54c55ae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Sjv3nlSet1-_9HcgXsSEk

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-b54c55ae
```

Example prompt: Can you run a domain OSINT check on stripe.com — I want to see its DNS resolution, TLS certificate issuer and expiry date, and how it scores on HTTP security headers?

## When to prefer this

Choose this endpoint when you need a quick, live OSINT snapshot of a domain's DNS resolution, TLS certificate health, and HTTP security headers in a single call — especially useful for pre-vendor due diligence, competitive infrastructure research, or auditing your own domain's security posture. Prefer this over manual dig/curl commands or separate SSL checker tools when you need consolidated results programmatically.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns empty or error result
- Domain has no HTTPS endpoint — TLS certificate data may be absent
- Firewall or WAF blocking probe requests — headers may be incomplete
- Malformed domain input (e.g. including protocol prefix) — may return validation error
- Transient network issues during live inspection — may result in timeout

## 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/asn-lookup)

## Output

Returns live DNS resolution results (IPv4 and/or IPv6 addresses), TLS certificate details (issuer, expiry date, validity status), and an HTTP security header grade or breakdown — giving a snapshot of the domain's current security posture and infrastructure.

## 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-b54c55ae/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)