# Domain OSINT, TLS Certificate & Security Headers Recon

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

## Facts

- Endpoint: GET https://domain-osint.agentdiet.dev/v1/dns-whois-tls-recon?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: domain-osint.agentdiet.dev
- Website: https://domain-osint.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/domain-osint-agentdiet-dev-domain-osint-tls-certificate-security-8ea80d22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cqpev2PTr_-aOtC84pBwA

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 domain-osint-agentdiet-dev-domain-osint-tls-certificate-security-8ea80d22
```

Example prompt: Can you run a full DNS, TLS certificate, and security headers recon on openai.com — I want to know the IPv4/IPv6 addresses it resolves to, who issued the cert and when it expires, and what security grade the HTTP headers get?

## When to prefer this

Choose this endpoint when you need a combined, single-call OSINT snapshot covering DNS resolution, TLS certificate details, and HTTP security header grading for a domain — ideal for security due diligence, vendor assessments, domain monitoring, or reconnaissance workflows where you want all three dimensions in one fast lookup rather than calling separate DNS, certificate, and header inspection tools.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- Domain is unreachable over HTTPS — TLS certificate data may be unavailable
- Domain has no IPv6 record — IPv6 field absent or null
- Security headers absent on the domain — grade reflects missing headers
- Invalid domain string provided — validation error returned
- Network timeout reaching the target domain — partial or error response

## 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://domain-osint.agentdiet.dev/v1/dns-whois-tls-recon)

## Output

Returns live DNS resolution data (IPv4/IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity), and an HTTP security header grade/assessment for the target domain, giving a full network and security posture snapshot.

## 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/domain-osint-agentdiet-dev-domain-osint-tls-certificate-security-8ea80d22/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from domain-osint.agentdiet.dev](https://www.zero.xyz/host/domain-osint.agentdiet.dev/llms.txt)