# 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).

Given a domain name, inspects live DNS resolution (IPv4/IPv6), TLS certificate issuer/expiry, and HTTP security header grade for OSINT and security analysis.

## Facts

- Endpoint: POST https://serp-extract.agentdiet.dev/v1/asn-lookup?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-a618756c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fmi0iL2ppPq8NlRs-GpaQ

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-a618756c -d '<json body>'
```

Example prompt: Can you run a full domain OSINT check on openai.com — I want to see its live DNS resolution (IPv4 and IPv6), TLS certificate issuer and expiry date, and HTTP security header grade?

## When to prefer this

Choose this endpoint when you need combined DNS, TLS certificate, and HTTP security header intelligence for a domain in a single call, particularly for OSINT workflows, security audits, vendor assessments, or certificate expiry monitoring. Prefer it over general-purpose DNS or SSL tools when you want all three data layers (DNS, TLS, security headers) in one lookup without stitching together multiple APIs.

## Known failure modes

- Domain does not resolve — DNS lookup returns no records, no IP addresses returned
- Domain is unreachable — TLS handshake or HTTP connection times out
- Invalid domain input — malformed or empty domain string returns validation error
- Domain has no TLS certificate — HTTP-only site returns no cert data
- Rate limiting or payment failure — 402 response if payment is not properly attached

## 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/asn-lookup)

## Output

Returns structured OSINT data including live IPv4 and IPv6 DNS resolutions, TLS certificate metadata (issuer, expiry date, validity status), and an HTTP security header grade/score for the target domain.

## 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-a618756c/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)