# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from github-audit.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

Performs live DNS resolution (IPv4/IPv6), TLS certificate inspection (issuer, expiry), and HTTP security header grading for a given domain.

## Facts

- Endpoint: POST https://github-audit.agentdiet.dev/v1/dns-whois-tls-recon?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: github-audit.agentdiet.dev
- Website: https://github-audit.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/github-audit-agentdiet-dev-domain-osint-tls-certificate-security-e9f60cca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VGz3e1A4c9wJGBdb85RzK

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 github-audit-agentdiet-dev-domain-osint-tls-certificate-security-e9f60cca -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you need a combined, single-call view of a domain's DNS resolution, TLS certificate health, and HTTP security posture — especially for OSINT investigations, pre-deal due diligence, security audits, or certificate expiry monitoring. It consolidates what would otherwise require separate DNS lookup, SSL checker, and security header scanner tools into one live call.

## Known failure modes

- Domain does not exist or fails to resolve — DNS lookup returns NXDOMAIN or empty result
- Domain is unreachable over HTTP/HTTPS — TLS handshake or connection timeout
- Invalid domain format supplied — validation error on input
- TLS certificate is self-signed or expired — returned as data but may indicate degraded grade
- Rate limiting or upstream resolver failures causing partial 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://github-audit.agentdiet.dev/v1/dns-whois-tls-recon)

## Output

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

## 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/github-audit-agentdiet-dev-domain-osint-tls-certificate-security-e9f60cca/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from github-audit.agentdiet.dev](https://www.zero.xyz/host/github-audit.agentdiet.dev/llms.txt)