# 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, and HTTP security header grading for a given domain.

## Facts

- Endpoint: POST https://serp-extract.agentdiet.dev/v1/dns-recon?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-2b7f4dae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ki_fgw-83MPix6vYF_f55

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-2b7f4dae -d '<json body>'
```

Example prompt: Can you run a full DNS and TLS recon on anthropic.com — I want to see its IPv4/IPv6 addresses, who issued its SSL certificate and when it expires, and what its HTTP security header grade looks like?

## When to prefer this

Choose this endpoint when you need live, multi-signal domain reconnaissance combining DNS resolution, TLS certificate inspection, and HTTP security header auditing in a single call. Prefer it over generic whois or ping tools when you specifically need TLS issuer/expiry details and HTTP security grading together. Ideal for security assessments, vendor due diligence, pre-deployment checks, or OSINT investigations on a domain.

## Known failure modes

- Domain does not exist or fails to resolve — returns DNS error or empty resolution
- Domain has no HTTPS/TLS — certificate fields may be absent or null
- Firewall or CDN blocking probe connections — partial results returned
- Invalid domain format in input — validation error returned
- Upstream DNS timeout — may return timeout or incomplete data

## 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/dns-recon)

## Output

Returns live DNS resolution results (IPv4/IPv6 addresses), TLS certificate metadata (issuer, expiry date, validity), and an HTTP security header assessment including grade and header presence — all as a structured JSON object.

## 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-2b7f4dae/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)