# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from json-repair.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

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

## Facts

- Endpoint: GET https://json-repair.agentdiet.dev/v1/dns-whois-tls-recon?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: json-repair.agentdiet.dev
- Website: https://json-repair.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/json-repair-agentdiet-dev-domain-osint-tls-certificate-security-5c6f424e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Dic-4cn55_VoX7ci4Qgp4

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 json-repair-agentdiet-dev-domain-osint-tls-certificate-security-5c6f424e
```

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 addresses, who issued their SSL cert and when it expires, and how their security headers grade out?

## When to prefer this

Choose this endpoint when you need a combined, live snapshot of a domain's DNS infrastructure, TLS certificate health, and HTTP security posture in a single call — especially useful for OSINT investigations, pre-engagement security assessments, third-party vendor risk checks, or monitoring certificate expiry. Prefer this over separate DNS lookup or SSL checker tools when you need all three signals together cheaply ($0.01/call).

## Known failure modes

- Domain does not exist or cannot be resolved — DNS lookup fails with NXDOMAIN
- TLS certificate absent or invalid — HTTPS not supported on the target domain
- Domain is unreachable or times out during live probe
- Malformed or empty domain input — validation error returned
- Rate limiting or payment failure for the $0.01 per-call fee

## 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://json-repair.agentdiet.dev/v1/dns-whois-tls-recon)

## Output

Returns live DNS resolution results (IPv4 and IPv6 addresses), TLS certificate metadata (issuer, common name, expiry dates, chain info), and an HTTP security header audit including grades/scores for 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/json-repair-agentdiet-dev-domain-osint-tls-certificate-security-5c6f424e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from json-repair.agentdiet.dev](https://www.zero.xyz/host/json-repair.agentdiet.dev/llms.txt)