# 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 2026-10-21).

Performs live reconnaissance on a domain including IPv4/IPv6 DNS resolution, TLS certificate issuer/expiry details, and HTTP security header grading

## Facts

- Endpoint: GET https://serp-extract.agentdiet.dev/v1/ssl-audit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-764ca016
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Pa8iCZV0eEYsHbbMevjvQ

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-764ca016
```

Example prompt: Can you check the TLS certificate details, DNS resolution, and HTTP security headers for stripe.com — I want to know the cert issuer, expiry date, and overall security grade?

## When to prefer this

Choose this endpoint when you need live, real-time OSINT on a specific domain's DNS, TLS certificate health, and HTTP security posture in a single call. Prefer it over manual lookups or separate tools when you need consolidated security reconnaissance — especially for vendor due diligence, SSL expiry monitoring, or competitive security analysis. It is particularly useful for agents that need to validate a domain's certificate issuer and expiry without scraping a full web page.

## Known failure modes

- Domain does not exist or fails DNS resolution — returns error indicating unresolvable domain
- Domain has no TLS certificate (HTTP-only) — certificate fields may be null or absent
- Domain is unreachable or times out — returns timeout or connectivity error
- Invalid domain format provided — returns validation error
- Domain has expired or been suspended — DNS resolution fails

## 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/ssl-audit)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, validity period, expiry date), and an HTTP security headers assessment including a security grade for the target domain

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "limit": {
   "type": "integer",
   "default": 20,
   "maximum": 100,
   "minimum": 1,
   "description": "Maximum number of items to return per page (1-100)"
  },
  "cursor": {
   "type": "string",
   "description": "Opaque pagination cursor for fetching the next page"
  },
  "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-764ca016/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)