# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from serp-extract.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://serp-extract.agentdiet.dev/v1/tls-scanner?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: serp-extract.agentdiet.dev
- Website: https://serp-extract.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/serp-extract-agentdiet-dev-domain-osint-tls-certificate-security-0fc245e7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dCYSCb9bzli8kZeu8-wRE

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 serp-extract-agentdiet-dev-domain-osint-tls-certificate-security-0fc245e7 -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you need a quick, live, single-domain security recon covering DNS, TLS certificate metadata, and HTTP security headers in one call — especially useful for OSINT investigations, pre-acquisition due diligence, certificate expiry checks, or phishing domain analysis. Prefer this over manual dig/curl workflows or multi-step certificate transparency lookups.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error or empty DNS records
- TLS connection times out or certificate is self-signed and unverifiable
- Domain blocks automated probes, returning no header data
- Invalid domain string input causes validation error
- Network unreachability results 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://serp-extract.agentdiet.dev/v1/tls-scanner)

## Output

Returns live DNS resolution results (IPv4 and/or IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity), and an HTTP security header grade reflecting the presence or absence of headers like HSTS, CSP, X-Frame-Options, etc.

## 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/serp-extract-agentdiet-dev-domain-osint-tls-certificate-security-0fc245e7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from serp-extract.agentdiet.dev](https://www.zero.xyz/host/serp-extract.agentdiet.dev/llms.txt)